399791124479 has 2 divisors, whose sum is σ = 399791124480. Its totient is φ = 399791124478.

The previous prime is 399791124463. The next prime is 399791124493. The reversal of 399791124479 is 974421197993.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399791124479 - 2⁴ = 399791124463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399791124409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199895562239 + 199895562240.

It is an arithmetic number, because the mean of its divisors is an integer number (199895562240).

Almost surely, 2^399791124479 is an apocalyptic number.

399791124479 is a deficient number, since it is larger than the sum of its proper divisors (1).

399791124479 is an equidigital number, since it uses as much as digits as its factorization.

399791124479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30862944, while the sum is 65.

The spelling of 399791124479 in words is "three hundred ninety-nine billion, seven hundred ninety-one million, one hundred twenty-four thousand, four hundred seventy-nine".