102690609 has 24 divisors (see below), whose sum is σ = 160445760. Its totient is φ = 57229440.

The previous prime is 102690593. The next prime is 102690613. The reversal of 102690609 is 906096201.

It is a happy number.

It is not a de Polignac number, because 102690609 - 2⁴ = 102690593 is a prime.

It is a super-2 number, since 2×102690609² = 21090722353581762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102690609.

It is not an unprimeable number, because it can be changed into a prime (102690509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33847 + ... + 36755.

It is an arithmetic number, because the mean of its divisors is an integer number (6685240).

Almost surely, 2^102690609 is an apocalyptic number.

It is an amenable number.

102690609 is a deficient number, since it is larger than the sum of its proper divisors (57755151).

102690609 is an equidigital number, since it uses as much as digits as its factorization.

102690609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3001 (or 2960 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 102690609 is about 10133.6375009174. The cubic root of 102690609 is about 468.2849960736.

The spelling of 102690609 in words is "one hundred two million, six hundred ninety thousand, six hundred nine".