39913963 has 2 divisors, whose sum is σ = 39913964. Its totient is φ = 39913962.

The previous prime is 39913961. The next prime is 39913967. The reversal of 39913963 is 36931993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39913963 - 2¹ = 39913961 is a prime.

Together with 39913961, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (39913961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19956981 + 19956982.

It is an arithmetic number, because the mean of its divisors is an integer number (19956982).

Almost surely, 2^39913963 is an apocalyptic number.

39913963 is a deficient number, since it is larger than the sum of its proper divisors (1).

39913963 is an equidigital number, since it uses as much as digits as its factorization.

39913963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 118098, while the sum is 43.

The square root of 39913963 is about 6317.7498367694. The cubic root of 39913963 is about 341.7498113204.

The spelling of 39913963 in words is "thirty-nine million, nine hundred thirteen thousand, nine hundred sixty-three".