87948431 has 4 divisors (see below), whose sum is σ = 87969864. Its totient is φ = 87927000.

The previous prime is 87948353. The next prime is 87948451. The reversal of 87948431 is 13484978.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87948431 is a prime.

It is a super-2 number, since 2×87948431² = 15469853030723522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87948451) 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, 2420 + ... + 13481.

It is an arithmetic number, because the mean of its divisors is an integer number (21992466).

Almost surely, 2^87948431 is an apocalyptic number.

87948431 is a deficient number, since it is larger than the sum of its proper divisors (21433).

87948431 is a wasteful number, since it uses less digits than its factorization.

87948431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21432.

The product of its digits is 193536, while the sum is 44.

The square root of 87948431 is about 9378.0824799103. The cubic root of 87948431 is about 444.7091159627.

The spelling of 87948431 in words is "eighty-seven million, nine hundred forty-eight thousand, four hundred thirty-one".