890109372087 has 32 divisors (see below), whose sum is σ = 1420180977600. Its totient is φ = 547735136256.

The previous prime is 890109372079. The next prime is 890109372101. The reversal of 890109372087 is 780273901098.

890109372087 is a `hidden beast` number, since 8 + 90 + 109 + 372 + 0 + 87 = 666.

It is not a de Polignac number, because 890109372087 - 2³ = 890109372079 is a prime.

It is a super-2 number, since 2×890109372087² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890109372287) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10730523 + ... + 10813155.

It is an arithmetic number, because the mean of its divisors is an integer number (44380655550).

Almost surely, 2^890109372087 is an apocalyptic number.

890109372087 is a deficient number, since it is larger than the sum of its proper divisors (530071605513).

890109372087 is a wasteful number, since it uses less digits than its factorization.

890109372087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113344 (or 113338 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The spelling of 890109372087 in words is "eight hundred ninety billion, one hundred nine million, three hundred seventy-two thousand, eighty-seven".