87917372 has 6 divisors (see below), whose sum is σ = 153855408. Its totient is φ = 43958684.

The previous prime is 87917371. The next prime is 87917377. The reversal of 87917372 is 27371978.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87917371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10989668 + ... + 10989675.

It is an arithmetic number, because the mean of its divisors is an integer number (25642568).

Almost surely, 2^87917372 is an apocalyptic number.

It is an amenable number.

87917372 is a deficient number, since it is larger than the sum of its proper divisors (65938036).

87917372 is a wasteful number, since it uses less digits than its factorization.

87917372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21979347 (or 21979345 counting only the distinct ones).

The product of its digits is 148176, while the sum is 44.

The square root of 87917372 is about 9376.4263981540. The cubic root of 87917372 is about 444.6567601048.

The spelling of 87917372 in words is "eighty-seven million, nine hundred seventeen thousand, three hundred seventy-two".