102431979 has 16 divisors (see below), whose sum is σ = 163424800. Its totient is φ = 63034848.

The previous prime is 102431957. The next prime is 102431999. The reversal of 102431979 is 979134201.

It is not a de Polignac number, because 102431979 - 2⁹ = 102431467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102431909) 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 15 ways as a sum of consecutive naturals, for example, 145564 + ... + 146265.

It is an arithmetic number, because the mean of its divisors is an integer number (10214050).

Almost surely, 2^102431979 is an apocalyptic number.

102431979 is a deficient number, since it is larger than the sum of its proper divisors (60992821).

102431979 is a wasteful number, since it uses less digits than its factorization.

102431979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291851 (or 291845 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 102431979 is about 10120.8684904014. The cubic root of 102431979 is about 467.8915346927.

The spelling of 102431979 in words is "one hundred two million, four hundred thirty-one thousand, nine hundred seventy-nine".