87974399 has 4 divisors (see below), whose sum is σ = 88339680. Its totient is φ = 87609120.

The previous prime is 87974387. The next prime is 87974401. The reversal of 87974399 is 99347978.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99347978 = 2 ⋅49673989.

It is a cyclic number.

It is not a de Polignac number, because 87974399 - 2⁸ = 87974143 is a prime.

It is a super-3 number, since 3×87974399³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87974339) 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, 182279 + ... + 182760.

It is an arithmetic number, because the mean of its divisors is an integer number (22084920).

Almost surely, 2^87974399 is an apocalyptic number.

87974399 is a deficient number, since it is larger than the sum of its proper divisors (365281).

87974399 is a wasteful number, since it uses less digits than its factorization.

87974399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365280.

The product of its digits is 3429216, while the sum is 56.

The square root of 87974399 is about 9379.4668825046. The cubic root of 87974399 is about 444.7528805105.

It can be divided in two parts, 8797 and 4399, that multiplied together give a triangular number (38698003 = T₈₇₉₇).

The spelling of 87974399 in words is "eighty-seven million, nine hundred seventy-four thousand, three hundred ninety-nine".