399108049 has 2 divisors, whose sum is σ = 399108050. Its totient is φ = 399108048.

The previous prime is 399108019. The next prime is 399108103. The reversal of 399108049 is 940801993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 391446225 + 7661824 = 19785^2 + 2768^2 .

It is a cyclic number.

It is not a de Polignac number, because 399108049 - 2⁹ = 399107537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 399107996 and 399108014.

It is not a weakly prime, because it can be changed into another prime (399108019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199554024 + 199554025.

It is an arithmetic number, because the mean of its divisors is an integer number (199554025).

Almost surely, 2^399108049 is an apocalyptic number.

It is an amenable number.

399108049 is a deficient number, since it is larger than the sum of its proper divisors (1).

399108049 is an equidigital number, since it uses as much as digits as its factorization.

399108049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 399108049 is about 19977.6887802368. The cubic root of 399108049 is about 736.2582295530.

The spelling of 399108049 in words is "three hundred ninety-nine million, one hundred eight thousand, forty-nine".