39924577397 has 2 divisors, whose sum is σ = 39924577398. Its totient is φ = 39924577396.

The previous prime is 39924577289. The next prime is 39924577463. The reversal of 39924577397 is 79377542993.

39924577397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32616721201 + 7307856196 = 180601^2 + 85486^2 .

It is a cyclic number.

It is not a de Polignac number, because 39924577397 - 2¹⁸ = 39924315253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39924577097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19962288698 + 19962288699.

It is an arithmetic number, because the mean of its divisors is an integer number (19962288699).

Almost surely, 2^39924577397 is an apocalyptic number.

It is an amenable number.

39924577397 is a deficient number, since it is larger than the sum of its proper divisors (1).

39924577397 is an equidigital number, since it uses as much as digits as its factorization.

39924577397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90016920, while the sum is 65.

The spelling of 39924577397 in words is "thirty-nine billion, nine hundred twenty-four million, five hundred seventy-seven thousand, three hundred ninety-seven".