102938831 has 4 divisors (see below), whose sum is σ = 103100064. Its totient is φ = 102777600.

The previous prime is 102938821. The next prime is 102938881. The reversal of 102938831 is 138839201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138839201 = 23 ⋅6036487.

It is a cyclic number.

It is not a de Polignac number, because 102938831 - 2⁶ = 102938767 is a prime.

It is a super-2 number, since 2×102938831² = 21192805855293122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102938791 and 102938800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102938821) 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, 79655 + ... + 80936.

It is an arithmetic number, because the mean of its divisors is an integer number (25775016).

Almost surely, 2^102938831 is an apocalyptic number.

102938831 is a deficient number, since it is larger than the sum of its proper divisors (161233).

102938831 is an equidigital number, since it uses as much as digits as its factorization.

102938831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161232.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 102938831 is about 10145.8775372069. The cubic root of 102938831 is about 468.6620026578.

The spelling of 102938831 in words is "one hundred two million, nine hundred thirty-eight thousand, eight hundred thirty-one".