39940319 has 2 divisors, whose sum is σ = 39940320. Its totient is φ = 39940318.

The previous prime is 39940301. The next prime is 39940321. The reversal of 39940319 is 91304993.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39940319 is a prime.

It is a super-2 number, since 2×39940319² = 3190458163643522, which contains 22 as substring.

Together with 39940321, 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 (39940819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19970159 + 19970160.

It is an arithmetic number, because the mean of its divisors is an integer number (19970160).

Almost surely, 2^39940319 is an apocalyptic number.

39940319 is a deficient number, since it is larger than the sum of its proper divisors (1).

39940319 is an equidigital number, since it uses as much as digits as its factorization.

39940319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 39940319 is about 6319.8353617796. The cubic root of 39940319 is about 341.8250162156.

The spelling of 39940319 in words is "thirty-nine million, nine hundred forty thousand, three hundred nineteen".