400253407 has 2 divisors, whose sum is σ = 400253408. Its totient is φ = 400253406.

The previous prime is 400253401. The next prime is 400253461. The reversal of 400253407 is 704352004.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400253407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400253401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200126703 + 200126704.

It is an arithmetic number, because the mean of its divisors is an integer number (200126704).

Almost surely, 2^400253407 is an apocalyptic number.

400253407 is a deficient number, since it is larger than the sum of its proper divisors (1).

400253407 is an equidigital number, since it uses as much as digits as its factorization.

400253407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 400253407 is about 20006.3341719566. The cubic root of 400253407 is about 736.9618601110.

The spelling of 400253407 in words is "four hundred million, two hundred fifty-three thousand, four hundred seven".