399769667701 has 2 divisors, whose sum is σ = 399769667702. Its totient is φ = 399769667700.

The previous prime is 399769667663. The next prime is 399769667711. The reversal of 399769667701 is 107766967993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366817979025 + 32951688676 = 605655^2 + 181526^2 .

It is an emirp because it is prime and its reverse (107766967993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 399769667701 - 2²⁹ = 399232796789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399769667711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199884833850 + 199884833851.

It is an arithmetic number, because the mean of its divisors is an integer number (199884833851).

Almost surely, 2^399769667701 is an apocalyptic number.

It is an amenable number.

399769667701 is a deficient number, since it is larger than the sum of its proper divisors (1).

399769667701 is an equidigital number, since it uses as much as digits as its factorization.

399769667701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162030456, while the sum is 70.

The spelling of 399769667701 in words is "three hundred ninety-nine billion, seven hundred sixty-nine million, six hundred sixty-seven thousand, seven hundred one".