39857963 has 2 divisors, whose sum is σ = 39857964. Its totient is φ = 39857962.

The previous prime is 39857959. The next prime is 39857969. The reversal of 39857963 is 36975893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39857963 - 2² = 39857959 is a prime.

It is not a weakly prime, because it can be changed into another prime (39857969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19928981 + 19928982.

It is an arithmetic number, because the mean of its divisors is an integer number (19928982).

Almost surely, 2^39857963 is an apocalyptic number.

39857963 is a deficient number, since it is larger than the sum of its proper divisors (1).

39857963 is an equidigital number, since it uses as much as digits as its factorization.

39857963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 50.

The square root of 39857963 is about 6313.3163234547. The cubic root of 39857963 is about 341.5899094941.

The spelling of 39857963 in words is "thirty-nine million, eight hundred fifty-seven thousand, nine hundred sixty-three".