87591953 has 2 divisors, whose sum is σ = 87591954. Its totient is φ = 87591952.

The previous prime is 87591941. The next prime is 87591967. The reversal of 87591953 is 35919578.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87291649 + 300304 = 9343^2 + 548^2 .

It is a cyclic number.

It is not a de Polignac number, because 87591953 - 2⁴ = 87591937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87591898 and 87591907.

It is not a weakly prime, because it can be changed into another prime (87591983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43795976 + 43795977.

It is an arithmetic number, because the mean of its divisors is an integer number (43795977).

Almost surely, 2^87591953 is an apocalyptic number.

It is an amenable number.

87591953 is a deficient number, since it is larger than the sum of its proper divisors (1).

87591953 is an equidigital number, since it uses as much as digits as its factorization.

87591953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 47.

The square root of 87591953 is about 9359.0572709007. The cubic root of 87591953 is about 444.1074615441.

The spelling of 87591953 in words is "eighty-seven million, five hundred ninety-one thousand, nine hundred fifty-three".