87356391 has 4 divisors (see below), whose sum is σ = 116475192. Its totient is φ = 58237592.

The previous prime is 87356389. The next prime is 87356393. The reversal of 87356391 is 19365378.

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

It is an interprime number because it is at equal distance from previous prime (87356389) and next prime (87356393).

It is a cyclic number.

It is not a de Polignac number, because 87356391 - 2¹ = 87356389 is a prime.

It is a super-2 number, since 2×87356391² = 15262278097089762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87356393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14559396 + ... + 14559401.

It is an arithmetic number, because the mean of its divisors is an integer number (29118798).

Almost surely, 2^87356391 is an apocalyptic number.

87356391 is a deficient number, since it is larger than the sum of its proper divisors (29118801).

87356391 is a wasteful number, since it uses less digits than its factorization.

87356391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29118800.

The product of its digits is 136080, while the sum is 42.

The square root of 87356391 is about 9346.4640907672. The cubic root of 87356391 is about 443.7089897695.

The spelling of 87356391 in words is "eighty-seven million, three hundred fifty-six thousand, three hundred ninety-one".