102920831 has 6 divisors (see below), whose sum is σ = 111447000. Its totient is φ = 95003688.

The previous prime is 102920827. The next prime is 102920833. The reversal of 102920831 is 138029201.

It is not a de Polignac number, because 102920831 - 2² = 102920827 is a prime.

It is a super-2 number, since 2×102920831² = 21185394907461122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102920831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102920833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 304331 + ... + 304668.

It is an arithmetic number, because the mean of its divisors is an integer number (18574500).

Almost surely, 2^102920831 is an apocalyptic number.

102920831 is a deficient number, since it is larger than the sum of its proper divisors (8526169).

102920831 is an equidigital number, since it uses as much as digits as its factorization.

102920831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609025 (or 609012 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 102920831 is about 10144.9904386352. The cubic root of 102920831 is about 468.6346841434.

The spelling of 102920831 in words is "one hundred two million, nine hundred twenty thousand, eight hundred thirty-one".