102645687 has 8 divisors (see below), whose sum is σ = 140043904. Its totient is φ = 66838968.

The previous prime is 102645679. The next prime is 102645709. The reversal of 102645687 is 786546201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102645687 - 2³ = 102645679 is a prime.

It is a super-2 number, since 2×102645687² = 21072274119403938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102645607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397723 + ... + 397980.

It is an arithmetic number, because the mean of its divisors is an integer number (17505488).

Almost surely, 2^102645687 is an apocalyptic number.

102645687 is a deficient number, since it is larger than the sum of its proper divisors (37398217).

102645687 is an equidigital number, since it uses as much as digits as its factorization.

102645687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795749.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 102645687 is about 10131.4207789431. The cubic root of 102645687 is about 468.2167023676.

It can be divided in two parts, 10264 and 5687, that added together give a palindrome (15951).

The spelling of 102645687 in words is "one hundred two million, six hundred forty-five thousand, six hundred eighty-seven".