400340329 has 2 divisors, whose sum is σ = 400340330. Its totient is φ = 400340328.

The previous prime is 400340261. The next prime is 400340341. The reversal of 400340329 is 923043004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385533225 + 14807104 = 19635^2 + 3848^2 .

It is a cyclic number.

It is not a de Polignac number, because 400340329 - 2⁷ = 400340201 is a prime.

It is not a weakly prime, because it can be changed into another prime (400340929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200170164 + 200170165.

It is an arithmetic number, because the mean of its divisors is an integer number (200170165).

Almost surely, 2^400340329 is an apocalyptic number.

It is an amenable number.

400340329 is a deficient number, since it is larger than the sum of its proper divisors (1).

400340329 is an equidigital number, since it uses as much as digits as its factorization.

400340329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 400340329 is about 20008.5064160222. The cubic root of 400340329 is about 737.0152042850.

The spelling of 400340329 in words is "four hundred million, three hundred forty thousand, three hundred twenty-nine".