404994157 has 2 divisors, whose sum is σ = 404994158. Its totient is φ = 404994156.

The previous prime is 404994133. The next prime is 404994181. The reversal of 404994157 is 751499404.

It is a balanced prime because it is at equal distance from previous prime (404994133) and next prime (404994181).

It can be written as a sum of positive squares in only one way, i.e., 265494436 + 139499721 = 16294^2 + 11811^2 .

It is a cyclic number.

It is not a de Polignac number, because 404994157 - 2¹⁹ = 404469869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404994127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202497078 + 202497079.

It is an arithmetic number, because the mean of its divisors is an integer number (202497079).

Almost surely, 2^404994157 is an apocalyptic number.

It is an amenable number.

404994157 is a deficient number, since it is larger than the sum of its proper divisors (1).

404994157 is an equidigital number, since it uses as much as digits as its factorization.

404994157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 404994157 is about 20124.4666264724. The cubic root of 404994157 is about 739.8600642383.

The spelling of 404994157 in words is "four hundred four million, nine hundred ninety-four thousand, one hundred fifty-seven".