52309991 has 2 divisors, whose sum is σ = 52309992. Its totient is φ = 52309990.

The previous prime is 52309987. The next prime is 52310023. The reversal of 52309991 is 19990325.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 52309991 - 2² = 52309987 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52309921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26154995 + 26154996.

It is an arithmetic number, because the mean of its divisors is an integer number (26154996).

Almost surely, 2^52309991 is an apocalyptic number.

52309991 is a deficient number, since it is larger than the sum of its proper divisors (1).

52309991 is an equidigital number, since it uses as much as digits as its factorization.

52309991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21870, while the sum is 38.

The square root of 52309991 is about 7232.5646212115. The cubic root of 52309991 is about 373.9913421314.

The spelling of 52309991 in words is "fifty-two million, three hundred nine thousand, nine hundred ninety-one".