400953997 has 2 divisors, whose sum is σ = 400953998. Its totient is φ = 400953996.

The previous prime is 400953983. The next prime is 400954013. The reversal of 400953997 is 799359004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 291521476 + 109432521 = 17074^2 + 10461^2 .

It is a cyclic number.

It is not a de Polignac number, because 400953997 - 2¹¹ = 400951949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400953937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200476998 + 200476999.

It is an arithmetic number, because the mean of its divisors is an integer number (200476999).

Almost surely, 2^400953997 is an apocalyptic number.

It is an amenable number.

400953997 is a deficient number, since it is larger than the sum of its proper divisors (1).

400953997 is an equidigital number, since it uses as much as digits as its factorization.

400953997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 46.

The square root of 400953997 is about 20023.8357214596. The cubic root of 400953997 is about 737.3915938333.

The spelling of 400953997 in words is "four hundred million, nine hundred fifty-three thousand, nine hundred ninety-seven".