3999380613401 has 2 divisors, whose sum is σ = 3999380613402. Its totient is φ = 3999380613400.

The previous prime is 3999380613353. The next prime is 3999380613407. The reversal of 3999380613401 is 1043160839993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3055084494400 + 944296119001 = 1747880^2 + 971749^2 .

It is an emirp because it is prime and its reverse (1043160839993) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3999380613401 is a prime.

It is not a weakly prime, because it can be changed into another prime (3999380613407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999690306700 + 1999690306701.

It is an arithmetic number, because the mean of its divisors is an integer number (1999690306701).

Almost surely, 2^{3999380613401} is an apocalyptic number.

It is an amenable number.

3999380613401 is a deficient number, since it is larger than the sum of its proper divisors (1).

3999380613401 is an equidigital number, since it uses as much as digits as its factorization.

3999380613401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3779136, while the sum is 56.

The spelling of 3999380613401 in words is "three trillion, nine hundred ninety-nine billion, three hundred eighty million, six hundred thirteen thousand, four hundred one".