87140973 has 8 divisors (see below), whose sum is σ = 122303200. Its totient is φ = 55036368.

The previous prime is 87140971. The next prime is 87140983. The reversal of 87140973 is 37904178.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87140973 - 2¹ = 87140971 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87140971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764338 + ... + 764451.

It is an arithmetic number, because the mean of its divisors is an integer number (15287900).

Almost surely, 2^87140973 is an apocalyptic number.

It is an amenable number.

87140973 is a deficient number, since it is larger than the sum of its proper divisors (35162227).

87140973 is a wasteful number, since it uses less digits than its factorization.

87140973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528811.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 87140973 is about 9334.9329403055. The cubic root of 87140973 is about 443.3439656121.

The spelling of 87140973 in words is "eighty-seven million, one hundred forty thousand, nine hundred seventy-three".