102640307 has 12 divisors (see below), whose sum is σ = 128937648. Its totient is φ = 79978800.

The previous prime is 102640303. The next prime is 102640333. The reversal of 102640307 is 703046201.

It is not a de Polignac number, because 102640307 - 2² = 102640303 is a prime.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (102640303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59744 + ... + 61437.

It is an arithmetic number, because the mean of its divisors is an integer number (10744804).

Almost surely, 2^102640307 is an apocalyptic number.

102640307 is a deficient number, since it is larger than the sum of its proper divisors (26297341).

102640307 is a wasteful number, since it uses less digits than its factorization.

102640307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121210 (or 121199 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 102640307 is about 10131.1552648254. The cubic root of 102640307 is about 468.2085219626.

Adding to 102640307 its reverse (703046201), we get a palindrome (805686508).

The spelling of 102640307 in words is "one hundred two million, six hundred forty thousand, three hundred seven".