39940439519 has 2 divisors, whose sum is σ = 39940439520. Its totient is φ = 39940439518.

The previous prime is 39940439479. The next prime is 39940439531. The reversal of 39940439519 is 91593404993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39940439519 - 2³² = 35645472223 is a prime.

It is a super-2 number, since 2×39940439519² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39940439569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19970219759 + 19970219760.

It is an arithmetic number, because the mean of its divisors is an integer number (19970219760).

Almost surely, 2^39940439519 is an apocalyptic number.

39940439519 is a deficient number, since it is larger than the sum of its proper divisors (1).

39940439519 is an equidigital number, since it uses as much as digits as its factorization.

39940439519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4723920, while the sum is 56.

The spelling of 39940439519 in words is "thirty-nine billion, nine hundred forty million, four hundred thirty-nine thousand, five hundred nineteen".