87970851 has 12 divisors (see below), whose sum is σ = 127998312. Its totient is φ = 58218336.

The previous prime is 87970847. The next prime is 87970853. The reversal of 87970851 is 15807978.

It is not a de Polignac number, because 87970851 - 2² = 87970847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87970797 and 87970806.

It is not an unprimeable number, because it can be changed into a prime (87970853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34441 + ... + 36906.

It is an arithmetic number, because the mean of its divisors is an integer number (10666526).

Almost surely, 2^87970851 is an apocalyptic number.

87970851 is a deficient number, since it is larger than the sum of its proper divisors (40027461).

87970851 is a wasteful number, since it uses less digits than its factorization.

87970851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71490 (or 71487 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 87970851 is about 9379.2777440483. The cubic root of 87970851 is about 444.7469014815.

The spelling of 87970851 in words is "eighty-seven million, nine hundred seventy thousand, eight hundred fifty-one".