491422369 has 2 divisors, whose sum is σ = 491422370. Its totient is φ = 491422368.

The previous prime is 491422357. The next prime is 491422427. The reversal of 491422369 is 963224194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 262051344 + 229371025 = 16188^2 + 15145^2 .

It is a cyclic number.

It is not a de Polignac number, because 491422369 - 2⁹ = 491421857 is a prime.

It is a super-2 number, since 2×491422369² = 482991889507144322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (491422319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245711184 + 245711185.

It is an arithmetic number, because the mean of its divisors is an integer number (245711185).

Almost surely, 2^491422369 is an apocalyptic number.

It is an amenable number.

491422369 is a deficient number, since it is larger than the sum of its proper divisors (1).

491422369 is an equidigital number, since it uses as much as digits as its factorization.

491422369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 40.

The square root of 491422369 is about 22168.0483804957. The cubic root of 491422369 is about 789.1356079926.

The spelling of 491422369 in words is "four hundred ninety-one million, four hundred twenty-two thousand, three hundred sixty-nine".