399936253 has 2 divisors, whose sum is σ = 399936254. Its totient is φ = 399936252.

The previous prime is 399936233. The next prime is 399936269. The reversal of 399936253 is 352639993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237067609 + 162868644 = 15397^2 + 12762^2 .

It is a cyclic number.

It is not a de Polignac number, because 399936253 - 2⁹ = 399935741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 399936197 and 399936206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399936223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199968126 + 199968127.

It is an arithmetic number, because the mean of its divisors is an integer number (199968127).

Almost surely, 2^399936253 is an apocalyptic number.

It is an amenable number.

399936253 is a deficient number, since it is larger than the sum of its proper divisors (1).

399936253 is an equidigital number, since it uses as much as digits as its factorization.

399936253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1180980, while the sum is 49.

The square root of 399936253 is about 19998.4062614999. The cubic root of 399936253 is about 736.7671566560.

The spelling of 399936253 in words is "three hundred ninety-nine million, nine hundred thirty-six thousand, two hundred fifty-three".