399977041 has 2 divisors, whose sum is σ = 399977042. Its totient is φ = 399977040.

The previous prime is 399976991. The next prime is 399977063. The reversal of 399977041 is 140779993.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397404225 + 2572816 = 19935^2 + 1604^2 .

It is a cyclic number.

It is not a de Polignac number, because 399977041 - 2⁹ = 399976529 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (399977741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199988520 + 199988521.

It is an arithmetic number, because the mean of its divisors is an integer number (199988521).

Almost surely, 2^399977041 is an apocalyptic number.

It is an amenable number.

399977041 is a deficient number, since it is larger than the sum of its proper divisors (1).

399977041 is an equidigital number, since it uses as much as digits as its factorization.

399977041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 428652, while the sum is 49.

The square root of 399977041 is about 19999.4260167636. The cubic root of 399977041 is about 736.7922025118.

The spelling of 399977041 in words is "three hundred ninety-nine million, nine hundred seventy-seven thousand, forty-one".