87864473 has 2 divisors, whose sum is σ = 87864474. Its totient is φ = 87864472.

The previous prime is 87864383. The next prime is 87864487. The reversal of 87864473 is 37446878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56145049 + 31719424 = 7493^2 + 5632^2 .

It is a cyclic number.

It is not a de Polignac number, because 87864473 - 2¹⁸ = 87602329 is a prime.

It is not a weakly prime, because it can be changed into another prime (87864373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43932236 + 43932237.

It is an arithmetic number, because the mean of its divisors is an integer number (43932237).

Almost surely, 2^87864473 is an apocalyptic number.

It is an amenable number.

87864473 is a deficient number, since it is larger than the sum of its proper divisors (1).

87864473 is an equidigital number, since it uses as much as digits as its factorization.

87864473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 47.

The square root of 87864473 is about 9373.6051228970. The cubic root of 87864473 is about 444.5675603762.

The spelling of 87864473 in words is "eighty-seven million, eight hundred sixty-four thousand, four hundred seventy-three".