87427591 has 2 divisors, whose sum is σ = 87427592. Its totient is φ = 87427590.

The previous prime is 87427541. The next prime is 87427597. The reversal of 87427591 is 19572478.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87427591 - 2⁹ = 87427079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87427597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43713795 + 43713796.

It is an arithmetic number, because the mean of its divisors is an integer number (43713796).

Almost surely, 2^87427591 is an apocalyptic number.

87427591 is a deficient number, since it is larger than the sum of its proper divisors (1).

87427591 is an equidigital number, since it uses as much as digits as its factorization.

87427591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 43.

The square root of 87427591 is about 9350.2722420259. The cubic root of 87427591 is about 443.8295056644.

The spelling of 87427591 in words is "eighty-seven million, four hundred twenty-seven thousand, five hundred ninety-one".