87955431 has 4 divisors (see below), whose sum is σ = 117273912. Its totient is φ = 58636952.

The previous prime is 87955421. The next prime is 87955457. The reversal of 87955431 is 13455978.

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 87955431 - 2⁶ = 87955367 is a prime.

It is a super-2 number, since 2×87955431² = 15472315684791522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87955411) 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, 14659236 + ... + 14659241.

It is an arithmetic number, because the mean of its divisors is an integer number (29318478).

Almost surely, 2^87955431 is an apocalyptic number.

87955431 is a deficient number, since it is larger than the sum of its proper divisors (29318481).

87955431 is a wasteful number, since it uses less digits than its factorization.

87955431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29318480.

The product of its digits is 151200, while the sum is 42.

The square root of 87955431 is about 9378.4556831069. The cubic root of 87955431 is about 444.7209140933.

The spelling of 87955431 in words is "eighty-seven million, nine hundred fifty-five thousand, four hundred thirty-one".