399099086293 has 2 divisors, whose sum is σ = 399099086294. Its totient is φ = 399099086292.

The previous prime is 399099086249. The next prime is 399099086299. The reversal of 399099086293 is 392680990993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 396065059569 + 3034026724 = 629337^2 + 55082^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399099086293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399099086299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199549543146 + 199549543147.

It is an arithmetic number, because the mean of its divisors is an integer number (199549543147).

Almost surely, 2^399099086293 is an apocalyptic number.

It is an amenable number.

399099086293 is a deficient number, since it is larger than the sum of its proper divisors (1).

399099086293 is an equidigital number, since it uses as much as digits as its factorization.

399099086293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51018336, while the sum is 67.

The spelling of 399099086293 in words is "three hundred ninety-nine billion, ninety-nine million, eighty-six thousand, two hundred ninety-three".