52991507 has 2 divisors, whose sum is σ = 52991508. Its totient is φ = 52991506.

The previous prime is 52991501. The next prime is 52991509. The reversal of 52991507 is 70519925.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52991507 is a prime.

Together with 52991509, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (52991501) 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, 26495753 + 26495754.

It is an arithmetic number, because the mean of its divisors is an integer number (26495754).

Almost surely, 2^52991507 is an apocalyptic number.

52991507 is a deficient number, since it is larger than the sum of its proper divisors (1).

52991507 is an equidigital number, since it uses as much as digits as its factorization.

52991507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28350, while the sum is 38.

The square root of 52991507 is about 7279.5265642760. The cubic root of 52991507 is about 375.6085101145.

The spelling of 52991507 in words is "fifty-two million, nine hundred ninety-one thousand, five hundred seven".