400134407 has 2 divisors, whose sum is σ = 400134408. Its totient is φ = 400134406.

The previous prime is 400134403. The next prime is 400134421. The reversal of 400134407 is 704431004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400134407 - 2² = 400134403 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400134403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200067203 + 200067204.

It is an arithmetic number, because the mean of its divisors is an integer number (200067204).

Almost surely, 2^400134407 is an apocalyptic number.

400134407 is a deficient number, since it is larger than the sum of its proper divisors (1).

400134407 is an equidigital number, since it uses as much as digits as its factorization.

400134407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 400134407 is about 20003.3598927780. The cubic root of 400134407 is about 736.8888170899. Note that the first 4 decimals are identical.

The spelling of 400134407 in words is "four hundred million, one hundred thirty-four thousand, four hundred seven".