404772497 has 2 divisors, whose sum is σ = 404772498. Its totient is φ = 404772496.

The previous prime is 404772479. The next prime is 404772503. The reversal of 404772497 is 794277404.

It is a happy number.

Together with previous prime (404772479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 350588176 + 54184321 = 18724^2 + 7361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404772497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (404702497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202386248 + 202386249.

It is an arithmetic number, because the mean of its divisors is an integer number (202386249).

Almost surely, 2^404772497 is an apocalyptic number.

It is an amenable number.

404772497 is a deficient number, since it is larger than the sum of its proper divisors (1).

404772497 is an equidigital number, since it uses as much as digits as its factorization.

404772497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 395136, while the sum is 44.

The square root of 404772497 is about 20118.9586460135. The cubic root of 404772497 is about 739.7250603890.

The spelling of 404772497 in words is "four hundred four million, seven hundred seventy-two thousand, four hundred ninety-seven".