1391616201 has 4 divisors (see below), whose sum is σ = 1855488272. Its totient is φ = 927744132.

The previous prime is 1391616199. The next prime is 1391616203. The reversal of 1391616201 is 1026161931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1026161931 = 3 ⋅342053977.

It is an interprime number because it is at equal distance from previous prime (1391616199) and next prime (1391616203).

It is not a de Polignac number, because 1391616201 - 2¹ = 1391616199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1391616203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231936031 + ... + 231936036.

It is an arithmetic number, because the mean of its divisors is an integer number (463872068).

Almost surely, 2^1391616201 is an apocalyptic number.

It is an amenable number.

1391616201 is a deficient number, since it is larger than the sum of its proper divisors (463872071).

1391616201 is an equidigital number, since it uses as much as digits as its factorization.

1391616201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463872070.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1391616201 is about 37304.3724112871. The cubic root of 1391616201 is about 1116.4514070059.

The spelling of 1391616201 in words is "one billion, three hundred ninety-one million, six hundred sixteen thousand, two hundred one".