4039136317421 has 2 divisors, whose sum is σ = 4039136317422. Its totient is φ = 4039136317420.

The previous prime is 4039136317399. The next prime is 4039136317537. The reversal of 4039136317421 is 1247136319304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3923766722500 + 115369594921 = 1980850^2 + 339661^2 .

It is a cyclic number.

It is not a de Polignac number, because 4039136317421 - 2²⁶ = 4039069208557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4039136337421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2019568158710 + 2019568158711.

It is an arithmetic number, because the mean of its divisors is an integer number (2019568158711).

Almost surely, 2^{4039136317421} is an apocalyptic number.

It is an amenable number.

4039136317421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4039136317421 is an equidigital number, since it uses as much as digits as its factorization.

4039136317421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 4039136317421 in words is "four trillion, thirty-nine billion, one hundred thirty-six million, three hundred seventeen thousand, four hundred twenty-one".