87973431 has 16 divisors (see below), whose sum is σ = 144367104. Its totient is φ = 46403424.

The previous prime is 87973411. The next prime is 87973451. The reversal of 87973431 is 13437978.

It is an interprime number because it is at equal distance from previous prime (87973411) and next prime (87973451).

It is not a de Polignac number, because 87973431 - 2¹³ = 87965239 is a prime.

It is a super-2 number, since 2×87973431² = 15478649123823522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87973411) 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 15 ways as a sum of consecutive naturals, for example, 160851 + ... + 161396.

It is an arithmetic number, because the mean of its divisors is an integer number (9022944).

Almost surely, 2^87973431 is an apocalyptic number.

87973431 is a deficient number, since it is larger than the sum of its proper divisors (56393673).

87973431 is a wasteful number, since it uses less digits than its factorization.

87973431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322270.

The product of its digits is 127008, while the sum is 42.

The square root of 87973431 is about 9379.4152802827. The cubic root of 87973431 is about 444.7512492694.

The spelling of 87973431 in words is "eighty-seven million, nine hundred seventy-three thousand, four hundred thirty-one".