102789139 has 8 divisors (see below), whose sum is σ = 107861760. Its totient is φ = 97766856.

The previous prime is 102789131. The next prime is 102789143. The reversal of 102789139 is 931987201.

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

It is a cyclic number.

It is not a de Polignac number, because 102789139 - 2³ = 102789131 is a prime.

It is a super-2 number, since 2×102789139² = 21131214192722642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102789131) 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, 8367 + ... + 16600.

It is an arithmetic number, because the mean of its divisors is an integer number (13482720).

Almost surely, 2^102789139 is an apocalyptic number.

102789139 is a deficient number, since it is larger than the sum of its proper divisors (5072621).

102789139 is a wasteful number, since it uses less digits than its factorization.

102789139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25169.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 102789139 is about 10138.4978670413. The cubic root of 102789139 is about 468.4347188577.

The spelling of 102789139 in words is "one hundred two million, seven hundred eighty-nine thousand, one hundred thirty-nine".