87911251 has 8 divisors (see below), whose sum is σ = 88643984. Its totient is φ = 87181920.

The previous prime is 87911249. The next prime is 87911261. The reversal of 87911251 is 15211978.

It is a happy number.

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 87911251 - 2¹ = 87911249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87911261) 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, 78145 + ... + 79261.

It is an arithmetic number, because the mean of its divisors is an integer number (11080498).

Almost surely, 2^87911251 is an apocalyptic number.

87911251 is a deficient number, since it is larger than the sum of its proper divisors (732733).

87911251 is a wasteful number, since it uses less digits than its factorization.

87911251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701.

The product of its digits is 5040, while the sum is 34.

The square root of 87911251 is about 9376.0999888013. The cubic root of 87911251 is about 444.6464405394.

The spelling of 87911251 in words is "eighty-seven million, nine hundred eleven thousand, two hundred fifty-one".