1986314401 has 4 divisors (see below), whose sum is σ = 2039998612. Its totient is φ = 1932630192.

The previous prime is 1986314399. The next prime is 1986314411. The reversal of 1986314401 is 1044136891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1044136891 = 7 ⋅149162413.

It can be written as a sum of positive squares in 2 ways, for example, as 1753599376 + 232715025 = 41876^2 + 15255^2 .

It is a cyclic number.

It is not a de Polignac number, because 1986314401 - 2¹ = 1986314399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 53684173 = 1986314401 / (1 + 9 + 8 + 6 + 3 + 1 + 4 + 4 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1986314411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26842050 + ... + 26842123.

It is an arithmetic number, because the mean of its divisors is an integer number (509999653).

Almost surely, 2^1986314401 is an apocalyptic number.

It is an amenable number.

1986314401 is a deficient number, since it is larger than the sum of its proper divisors (53684211).

1986314401 is an equidigital number, since it uses as much as digits as its factorization.

1986314401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53684210.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 1986314401 is about 44568.0872486132. The cubic root of 1986314401 is about 1257.0406742156.

The spelling of 1986314401 in words is "one billion, nine hundred eighty-six million, three hundred fourteen thousand, four hundred one".