400207967 has 2 divisors, whose sum is σ = 400207968. Its totient is φ = 400207966.

The previous prime is 400207949. The next prime is 400207979. The reversal of 400207967 is 769702004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400207967 - 2⁶ = 400207903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400207937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200103983 + 200103984.

It is an arithmetic number, because the mean of its divisors is an integer number (200103984).

Almost surely, 2^400207967 is an apocalyptic number.

400207967 is a deficient number, since it is larger than the sum of its proper divisors (1).

400207967 is an equidigital number, since it uses as much as digits as its factorization.

400207967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 400207967 is about 20005.1984993901. The cubic root of 400207967 is about 736.9339704343.

The spelling of 400207967 in words is "four hundred million, two hundred seven thousand, nine hundred sixty-seven".