39936052391 has 2 divisors, whose sum is σ = 39936052392. Its totient is φ = 39936052390.

The previous prime is 39936052339. The next prime is 39936052393. The reversal of 39936052391 is 19325063993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39936052391 - 2¹⁰ = 39936051367 is a prime.

Together with 39936052393, 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 (39936052393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19968026195 + 19968026196.

It is an arithmetic number, because the mean of its divisors is an integer number (19968026196).

Almost surely, 2^39936052391 is an apocalyptic number.

39936052391 is a deficient number, since it is larger than the sum of its proper divisors (1).

39936052391 is an equidigital number, since it uses as much as digits as its factorization.

39936052391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1180980, while the sum is 50.

The spelling of 39936052391 in words is "thirty-nine billion, nine hundred thirty-six million, fifty-two thousand, three hundred ninety-one".