53965591 has 2 divisors, whose sum is σ = 53965592. Its totient is φ = 53965590.

The previous prime is 53965547. The next prime is 53965601. The reversal of 53965591 is 19556935.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53965591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53965991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26982795 + 26982796.

It is an arithmetic number, because the mean of its divisors is an integer number (26982796).

Almost surely, 2^53965591 is an apocalyptic number.

53965591 is a deficient number, since it is larger than the sum of its proper divisors (1).

53965591 is an equidigital number, since it uses as much as digits as its factorization.

53965591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 182250, while the sum is 43.

The square root of 53965591 is about 7346.1276193652. The cubic root of 53965591 is about 377.8960152744.

The spelling of 53965591 in words is "fifty-three million, nine hundred sixty-five thousand, five hundred ninety-one".