102626431 has 4 divisors (see below), whose sum is σ = 102654432. Its totient is φ = 102598432.

The previous prime is 102626417. The next prime is 102626449. The reversal of 102626431 is 134626201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102626431 is a prime.

It is a super-2 number, since 2×102626431² = 21064368679595522, 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 = 102626396 and 102626405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102626411) 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, 7495 + ... + 16168.

It is an arithmetic number, because the mean of its divisors is an integer number (25663608).

Almost surely, 2^102626431 is an apocalyptic number.

102626431 is a deficient number, since it is larger than the sum of its proper divisors (28001).

102626431 is an equidigital number, since it uses as much as digits as its factorization.

102626431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28000.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 102626431 is about 10130.4704234305. The cubic root of 102626431 is about 468.1874218886.

The spelling of 102626431 in words is "one hundred two million, six hundred twenty-six thousand, four hundred thirty-one".