87325691 has 4 divisors (see below), whose sum is σ = 91921800. Its totient is φ = 82729584.

The previous prime is 87325663. The next prime is 87325703. The reversal of 87325691 is 19652378.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87325691 - 2¹⁰ = 87324667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87325631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2298026 + ... + 2298063.

It is an arithmetic number, because the mean of its divisors is an integer number (22980450).

Almost surely, 2^87325691 is an apocalyptic number.

87325691 is a deficient number, since it is larger than the sum of its proper divisors (4596109).

87325691 is a wasteful number, since it uses less digits than its factorization.

87325691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4596108.

The product of its digits is 90720, while the sum is 41.

The square root of 87325691 is about 9344.8216141348. The cubic root of 87325691 is about 443.6570055477.

The spelling of 87325691 in words is "eighty-seven million, three hundred twenty-five thousand, six hundred ninety-one".