1951984101 has 4 divisors (see below), whose sum is σ = 2602645472. Its totient is φ = 1301322732.

The previous prime is 1951984063. The next prime is 1951984109. The reversal of 1951984101 is 1014891591.

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.

It is not a de Polignac number, because 1951984101 - 2¹⁵ = 1951951333 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1951984101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1951984109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325330681 + ... + 325330686.

It is an arithmetic number, because the mean of its divisors is an integer number (650661368).

Almost surely, 2^1951984101 is an apocalyptic number.

It is an amenable number.

1951984101 is a deficient number, since it is larger than the sum of its proper divisors (650661371).

1951984101 is an equidigital number, since it uses as much as digits as its factorization.

1951984101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650661370.

The product of its (nonzero) digits is 12960, while the sum is 39.

The square root of 1951984101 is about 44181.2641399044. The cubic root of 1951984101 is about 1249.7565608063.

The spelling of 1951984101 in words is "one billion, nine hundred fifty-one million, nine hundred eighty-four thousand, one hundred one".