87715451 has 4 divisors (see below), whose sum is σ = 88619832. Its totient is φ = 86811072.

The previous prime is 87715421. The next prime is 87715469. The reversal of 87715451 is 15451778.

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 87715451 - 2⁶ = 87715387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87715421) 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, 452045 + ... + 452238.

It is an arithmetic number, because the mean of its divisors is an integer number (22154958).

Almost surely, 2^87715451 is an apocalyptic number.

87715451 is a deficient number, since it is larger than the sum of its proper divisors (904381).

87715451 is an equidigital number, since it uses as much as digits as its factorization.

87715451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904380.

The product of its digits is 39200, while the sum is 38.

The square root of 87715451 is about 9365.6527268525. The cubic root of 87715451 is about 444.3160827898.

The spelling of 87715451 in words is "eighty-seven million, seven hundred fifteen thousand, four hundred fifty-one".