399604753 has 2 divisors, whose sum is σ = 399604754. Its totient is φ = 399604752.

The previous prime is 399604747. The next prime is 399604837. The reversal of 399604753 is 357406993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 378380304 + 21224449 = 19452^2 + 4607^2 .

It is an emirp because it is prime and its reverse (357406993) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399604753 is a prime.

It is not a weakly prime, because it can be changed into another prime (399605753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199802376 + 199802377.

It is an arithmetic number, because the mean of its divisors is an integer number (199802377).

Almost surely, 2^399604753 is an apocalyptic number.

It is an amenable number.

399604753 is a deficient number, since it is larger than the sum of its proper divisors (1).

399604753 is an equidigital number, since it uses as much as digits as its factorization.

399604753 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 46.

The square root of 399604753 is about 19990.1163828528. The cubic root of 399604753 is about 736.5635360179.

The spelling of 399604753 in words is "three hundred ninety-nine million, six hundred four thousand, seven hundred fifty-three".