400320007 has 2 divisors, whose sum is σ = 400320008. Its totient is φ = 400320006.

The previous prime is 400320001. The next prime is 400320017. The reversal of 400320007 is 700023004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400320007 - 2³ = 400319999 is a prime.

It is a super-2 number, since 2×400320007² = 320512216008960098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400320001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200160003 + 200160004.

It is an arithmetic number, because the mean of its divisors is an integer number (200160004).

Almost surely, 2^400320007 is an apocalyptic number.

400320007 is a deficient number, since it is larger than the sum of its proper divisors (1).

400320007 is an equidigital number, since it uses as much as digits as its factorization.

400320007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 400320007 is about 20007.9985755697. The cubic root of 400320007 is about 737.0027333319.

The spelling of 400320007 in words is "four hundred million, three hundred twenty thousand, seven".