52649591 has 2 divisors, whose sum is σ = 52649592. Its totient is φ = 52649590.

The previous prime is 52649567. The next prime is 52649593. The reversal of 52649591 is 19594625.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52649591 is a prime.

Together with 52649593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52649593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26324795 + 26324796.

It is an arithmetic number, because the mean of its divisors is an integer number (26324796).

Almost surely, 2^52649591 is an apocalyptic number.

52649591 is a deficient number, since it is larger than the sum of its proper divisors (1).

52649591 is an equidigital number, since it uses as much as digits as its factorization.

52649591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 41.

The square root of 52649591 is about 7256.0037899659. The cubic root of 52649591 is about 374.7989227189.

The spelling of 52649591 in words is "fifty-two million, six hundred forty-nine thousand, five hundred ninety-one".