102139569 has 64 divisors (see below), whose sum is σ = 181440000. Its totient is φ = 56730240.

The previous prime is 102139547. The next prime is 102139579. The reversal of 102139569 is 965931201.

It is not a de Polignac number, because 102139569 - 2⁷ = 102139441 is a prime.

It is a super-2 number, since 2×102139569² = 20864983111011522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (102139579) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 379567 + ... + 379835.

It is an arithmetic number, because the mean of its divisors is an integer number (2835000).

Almost surely, 2^102139569 is an apocalyptic number.

It is an amenable number.

102139569 is a deficient number, since it is larger than the sum of its proper divisors (79300431).

102139569 is an equidigital number, since it uses as much as digits as its factorization.

102139569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 102139569 is about 10106.4122714245. The cubic root of 102139569 is about 467.4458842867.

The spelling of 102139569 in words is "one hundred two million, one hundred thirty-nine thousand, five hundred sixty-nine".