399396291241 has 2 divisors, whose sum is σ = 399396291242. Its totient is φ = 399396291240.

The previous prime is 399396291223. The next prime is 399396291271. The reversal of 399396291241 is 142192693993.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221632866841 + 177763424400 = 470779^2 + 421620^2 .

It is a cyclic number.

It is not a de Polignac number, because 399396291241 - 2⁹ = 399396290729 is a prime.

It is not a weakly prime, because it can be changed into another prime (399396291221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199698145620 + 199698145621.

It is an arithmetic number, because the mean of its divisors is an integer number (199698145621).

Almost surely, 2^399396291241 is an apocalyptic number.

It is an amenable number.

399396291241 is a deficient number, since it is larger than the sum of its proper divisors (1).

399396291241 is an equidigital number, since it uses as much as digits as its factorization.

399396291241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5668704, while the sum is 58.

The spelling of 399396291241 in words is "three hundred ninety-nine billion, three hundred ninety-six million, two hundred ninety-one thousand, two hundred forty-one".