409220731 has 2 divisors, whose sum is σ = 409220732. Its totient is φ = 409220730.

The previous prime is 409220633. The next prime is 409220737. The reversal of 409220731 is 137022904.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 409220731 - 2⁹ = 409220219 is a prime.

It is a super-2 number, since 2×409220731² = 334923213360348722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 409220731.

It is not a weakly prime, because it can be changed into another prime (409220737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204610365 + 204610366.

It is an arithmetic number, because the mean of its divisors is an integer number (204610366).

Almost surely, 2^409220731 is an apocalyptic number.

409220731 is a deficient number, since it is larger than the sum of its proper divisors (1).

409220731 is an equidigital number, since it uses as much as digits as its factorization.

409220731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 409220731 is about 20229.2049028132. The cubic root of 409220731 is about 742.4249224424.

The spelling of 409220731 in words is "four hundred nine million, two hundred twenty thousand, seven hundred thirty-one".