491115049 has 2 divisors, whose sum is σ = 491115050. Its totient is φ = 491115048.

The previous prime is 491115043. The next prime is 491115071. The reversal of 491115049 is 940511194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 385847449 + 105267600 = 19643^2 + 10260^2 .

It is a cyclic number.

It is not a de Polignac number, because 491115049 - 2⁵ = 491115017 is a prime.

It is not a weakly prime, because it can be changed into another prime (491115043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245557524 + 245557525.

It is an arithmetic number, because the mean of its divisors is an integer number (245557525).

Almost surely, 2^491115049 is an apocalyptic number.

It is an amenable number.

491115049 is a deficient number, since it is larger than the sum of its proper divisors (1).

491115049 is an equidigital number, since it uses as much as digits as its factorization.

491115049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 491115049 is about 22161.1156984480. The cubic root of 491115049 is about 788.9710735431.

The spelling of 491115049 in words is "four hundred ninety-one million, one hundred fifteen thousand, forty-nine".