87626251 has 4 divisors (see below), whose sum is σ = 91436112. Its totient is φ = 83816392.

The previous prime is 87626239. The next prime is 87626261. The reversal of 87626251 is 15262678.

It is a happy number.

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 87626251 - 2⁵ = 87626219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87626251.

It is not an unprimeable number, because it can be changed into a prime (87626221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1904896 + ... + 1904941.

It is an arithmetic number, because the mean of its divisors is an integer number (22859028).

Almost surely, 2^87626251 is an apocalyptic number.

87626251 is a deficient number, since it is larger than the sum of its proper divisors (3809861).

87626251 is a wasteful number, since it uses less digits than its factorization.

87626251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3809860.

The product of its digits is 40320, while the sum is 37.

The square root of 87626251 is about 9360.8894342365. The cubic root of 87626251 is about 444.1654197222.

The spelling of 87626251 in words is "eighty-seven million, six hundred twenty-six thousand, two hundred fifty-one".