404750491 has 2 divisors, whose sum is σ = 404750492. Its totient is φ = 404750490.

The previous prime is 404750431. The next prime is 404750509. The reversal of 404750491 is 194057404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 404750491 - 2⁹ = 404749979 is a prime.

It is not a weakly prime, because it can be changed into another prime (404750431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202375245 + 202375246.

It is an arithmetic number, because the mean of its divisors is an integer number (202375246).

Almost surely, 2^404750491 is an apocalyptic number.

404750491 is a deficient number, since it is larger than the sum of its proper divisors (1).

404750491 is an equidigital number, since it uses as much as digits as its factorization.

404750491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 404750491 is about 20118.4117414870. The cubic root of 404750491 is about 739.7116547642.

The spelling of 404750491 in words is "four hundred four million, seven hundred fifty thousand, four hundred ninety-one".