404190947 has 2 divisors, whose sum is σ = 404190948. Its totient is φ = 404190946.

The previous prime is 404190931. The next prime is 404190961. The reversal of 404190947 is 749091404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 404190947 - 2⁴ = 404190931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 404190947.

It is not a weakly prime, because it can be changed into another prime (404190907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202095473 + 202095474.

It is an arithmetic number, because the mean of its divisors is an integer number (202095474).

Almost surely, 2^404190947 is an apocalyptic number.

404190947 is a deficient number, since it is larger than the sum of its proper divisors (1).

404190947 is an equidigital number, since it uses as much as digits as its factorization.

404190947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 404190947 is about 20104.5006652739. The cubic root of 404190947 is about 739.3706281272.

The spelling of 404190947 in words is "four hundred four million, one hundred ninety thousand, nine hundred forty-seven".