40491049 has 2 divisors, whose sum is σ = 40491050. Its totient is φ = 40491048.

The previous prime is 40491041. The next prime is 40491089. The reversal of 40491049 is 94019404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34140649 + 6350400 = 5843^2 + 2520^2 .

It is a cyclic number.

It is not a de Polignac number, because 40491049 - 2³ = 40491041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40491049.

It is not a weakly prime, because it can be changed into another prime (40491041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20245524 + 20245525.

It is an arithmetic number, because the mean of its divisors is an integer number (20245525).

Almost surely, 2^40491049 is an apocalyptic number.

It is an amenable number.

40491049 is a deficient number, since it is larger than the sum of its proper divisors (1).

40491049 is an equidigital number, since it uses as much as digits as its factorization.

40491049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 40491049 is about 6363.2577348399. The cubic root of 40491049 is about 343.3889713039.

The spelling of 40491049 in words is "forty million, four hundred ninety-one thousand, forty-nine".