87291963 has 24 divisors (see below), whose sum is σ = 137959536. Its totient is φ = 52747200.

The previous prime is 87291959. The next prime is 87291979. The reversal of 87291963 is 36919278.

It is not a de Polignac number, because 87291963 - 2² = 87291959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87291863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38193 + ... + 40413.

It is an arithmetic number, because the mean of its divisors is an integer number (5748314).

Almost surely, 2^87291963 is an apocalyptic number.

87291963 is a deficient number, since it is larger than the sum of its proper divisors (50667573).

87291963 is a wasteful number, since it uses less digits than its factorization.

87291963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2635 (or 2632 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 87291963 is about 9343.0168040093. The cubic root of 87291963 is about 443.5998799748.

The spelling of 87291963 in words is "eighty-seven million, two hundred ninety-one thousand, nine hundred sixty-three".