87972459 has 4 divisors (see below), whose sum is σ = 117296616. Its totient is φ = 58648304.

The previous prime is 87972397. The next prime is 87972463. The reversal of 87972459 is 95427978.

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 87972459 - 2¹¹ = 87970411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87972359) 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, 14662074 + ... + 14662079.

It is an arithmetic number, because the mean of its divisors is an integer number (29324154).

Almost surely, 2^87972459 is an apocalyptic number.

87972459 is a deficient number, since it is larger than the sum of its proper divisors (29324157).

87972459 is a wasteful number, since it uses less digits than its factorization.

87972459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29324156.

The product of its digits is 1270080, while the sum is 51.

The square root of 87972459 is about 9379.3634645428. The cubic root of 87972459 is about 444.7496112756.

The spelling of 87972459 in words is "eighty-seven million, nine hundred seventy-two thousand, four hundred fifty-nine".