400407323 has 2 divisors, whose sum is σ = 400407324. Its totient is φ = 400407322.

The previous prime is 400407317. The next prime is 400407347. The reversal of 400407323 is 323704004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400407323 - 2¹⁶ = 400341787 is a prime.

It is not a weakly prime, because it can be changed into another prime (400407373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200203661 + 200203662.

It is an arithmetic number, because the mean of its divisors is an integer number (200203662).

Almost surely, 2^400407323 is an apocalyptic number.

400407323 is a deficient number, since it is larger than the sum of its proper divisors (1).

400407323 is an equidigital number, since it uses as much as digits as its factorization.

400407323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 23.

The square root of 400407323 is about 20010.1804839437. The cubic root of 400407323 is about 737.0563133440.

The spelling of 400407323 in words is "four hundred million, four hundred seven thousand, three hundred twenty-three".