87476531 has 2 divisors, whose sum is σ = 87476532. Its totient is φ = 87476530.

The previous prime is 87476507. The next prime is 87476537. The reversal of 87476531 is 13567478.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87476531 is a prime.

It is a super-2 number, since 2×87476531² = 15304286951587922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87476537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43738265 + 43738266.

It is an arithmetic number, because the mean of its divisors is an integer number (43738266).

Almost surely, 2^87476531 is an apocalyptic number.

87476531 is a deficient number, since it is larger than the sum of its proper divisors (1).

87476531 is an equidigital number, since it uses as much as digits as its factorization.

87476531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 41.

The square root of 87476531 is about 9352.8889119886. Note that the first 3 decimals coincide. The cubic root of 87476531 is about 443.9123054763.

The spelling of 87476531 in words is "eighty-seven million, four hundred seventy-six thousand, five hundred thirty-one".