400932449 has 2 divisors, whose sum is σ = 400932450. Its totient is φ = 400932448.

The previous prime is 400932409. The next prime is 400932457. The reversal of 400932449 is 944239004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 314814049 + 86118400 = 17743^2 + 9280^2 .

It is a cyclic number.

It is not a de Polignac number, because 400932449 - 2²⁸ = 132496993 is a prime.

It is a super-2 number, since 2×400932449² = 321493657322275202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (400932409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200466224 + 200466225.

It is an arithmetic number, because the mean of its divisors is an integer number (200466225).

Almost surely, 2^400932449 is an apocalyptic number.

It is an amenable number.

400932449 is a deficient number, since it is larger than the sum of its proper divisors (1).

400932449 is an equidigital number, since it uses as much as digits as its factorization.

400932449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 400932449 is about 20023.2976554812. The cubic root of 400932449 is about 737.3783840064.

The spelling of 400932449 in words is "four hundred million, nine hundred thirty-two thousand, four hundred forty-nine".