40494449 has 2 divisors, whose sum is σ = 40494450. Its totient is φ = 40494448.

The previous prime is 40494431. The next prime is 40494451. The reversal of 40494449 is 94449404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39942400 + 552049 = 6320^2 + 743^2 .

It is a cyclic number.

It is not a de Polignac number, because 40494449 - 2⁸ = 40494193 is a prime.

Together with 40494451, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40494409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20247224 + 20247225.

It is an arithmetic number, because the mean of its divisors is an integer number (20247225).

Almost surely, 2^40494449 is an apocalyptic number.

It is an amenable number.

40494449 is a deficient number, since it is larger than the sum of its proper divisors (1).

40494449 is an equidigital number, since it uses as much as digits as its factorization.

40494449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 40494449 is about 6363.5248879846. The cubic root of 40494449 is about 343.3985823979.

The spelling of 40494449 in words is "forty million, four hundred ninety-four thousand, four hundred forty-nine".