87290961 has 8 divisors (see below), whose sum is σ = 117038880. Its totient is φ = 57868512.

The previous prime is 87290941. The next prime is 87290963. The reversal of 87290961 is 16909278.

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

It is not a de Polignac number, because 87290961 - 2¹⁸ = 87028817 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (87290963) 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, 80740 + ... + 81813.

It is an arithmetic number, because the mean of its divisors is an integer number (14629860).

Almost surely, 2^87290961 is an apocalyptic number.

It is an amenable number.

87290961 is a deficient number, since it is larger than the sum of its proper divisors (29747919).

87290961 is a wasteful number, since it uses less digits than its factorization.

87290961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162735.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 87290961 is about 9342.9631809186. The cubic root of 87290961 is about 443.5981826487.

The spelling of 87290961 in words is "eighty-seven million, two hundred ninety thousand, nine hundred sixty-one".