39657906413 has 2 divisors, whose sum is σ = 39657906414. Its totient is φ = 39657906412.

The previous prime is 39657906403. The next prime is 39657906419. The reversal of 39657906413 is 31460975693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37786305769 + 1871600644 = 194387^2 + 43262^2 .

It is a cyclic number.

It is not a de Polignac number, because 39657906413 - 2¹⁴ = 39657890029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39657906419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19828953206 + 19828953207.

It is an arithmetic number, because the mean of its divisors is an integer number (19828953207).

Almost surely, 2^39657906413 is an apocalyptic number.

It is an amenable number.

39657906413 is a deficient number, since it is larger than the sum of its proper divisors (1).

39657906413 is an equidigital number, since it uses as much as digits as its factorization.

39657906413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3674160, while the sum is 53.

The spelling of 39657906413 in words is "thirty-nine billion, six hundred fifty-seven million, nine hundred six thousand, four hundred thirteen".