400297608653 has 2 divisors, whose sum is σ = 400297608654. Its totient is φ = 400297608652.

The previous prime is 400297608647. The next prime is 400297608721. The reversal of 400297608653 is 356806792004.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 306221677129 + 94075931524 = 553373^2 + 306718^2 .

It is a cyclic number.

It is not a de Polignac number, because 400297608653 - 2⁶ = 400297608589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400297608853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200148804326 + 200148804327.

It is an arithmetic number, because the mean of its divisors is an integer number (200148804327).

Almost surely, 2^400297608653 is an apocalyptic number.

It is an amenable number.

400297608653 is a deficient number, since it is larger than the sum of its proper divisors (1).

400297608653 is an equidigital number, since it uses as much as digits as its factorization.

400297608653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 400297608653 in words is "four hundred billion, two hundred ninety-seven million, six hundred eight thousand, six hundred fifty-three".