400456613 has 2 divisors, whose sum is σ = 400456614. Its totient is φ = 400456612.

The previous prime is 400456583. The next prime is 400456627. The reversal of 400456613 is 316654004.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217179169 + 183277444 = 14737^2 + 13538^2 .

It is a cyclic number.

It is not a de Polignac number, because 400456613 - 2¹⁶ = 400391077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400456663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200228306 + 200228307.

It is an arithmetic number, because the mean of its divisors is an integer number (200228307).

Almost surely, 2^400456613 is an apocalyptic number.

It is an amenable number.

400456613 is a deficient number, since it is larger than the sum of its proper divisors (1).

400456613 is an equidigital number, since it uses as much as digits as its factorization.

400456613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 400456613 is about 20011.4120691170. The cubic root of 400456613 is about 737.0865558937.

The spelling of 400456613 in words is "four hundred million, four hundred fifty-six thousand, six hundred thirteen".