87670057 has 8 divisors (see below), whose sum is σ = 90513416. Its totient is φ = 84851712.

The previous prime is 87670049. The next prime is 87670067. The reversal of 87670057 is 75007678.

It can be written as a sum of positive squares in 4 ways, for example, as 4932841 + 82737216 = 2221^2 + 9096^2 .

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 87670057 - 2³ = 87670049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87670027) 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, 1003 + ... + 13279.

It is an arithmetic number, because the mean of its divisors is an integer number (11314177).

Almost surely, 2^87670057 is an apocalyptic number.

It is an amenable number.

87670057 is a deficient number, since it is larger than the sum of its proper divisors (2843359).

87670057 is a wasteful number, since it uses less digits than its factorization.

87670057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12507.

The product of its (nonzero) digits is 82320, while the sum is 40.

The square root of 87670057 is about 9363.2289836359. The cubic root of 87670057 is about 444.2394229222.

The spelling of 87670057 in words is "eighty-seven million, six hundred seventy thousand, fifty-seven".