87096921 has 16 divisors (see below), whose sum is σ = 118609920. Its totient is φ = 56833040.

The previous prime is 87096871. The next prime is 87096937. The reversal of 87096921 is 12969078.

It is a cyclic number.

It is not a de Polignac number, because 87096921 - 2²³ = 78708313 is a prime.

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 (87096941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45616 + ... + 47486.

It is an arithmetic number, because the mean of its divisors is an integer number (7413120).

Almost surely, 2^87096921 is an apocalyptic number.

It is an amenable number.

87096921 is a deficient number, since it is larger than the sum of its proper divisors (31512999).

87096921 is a wasteful number, since it uses less digits than its factorization.

87096921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2196.

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

The square root of 87096921 is about 9332.5731178491. The cubic root of 87096921 is about 443.2692457659.

The spelling of 87096921 in words is "eighty-seven million, ninety-six thousand, nine hundred twenty-one".