40457489 has 2 divisors, whose sum is σ = 40457490. Its totient is φ = 40457488.

The previous prime is 40457477. The next prime is 40457491. The reversal of 40457489 is 98475404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38539264 + 1918225 = 6208^2 + 1385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40457489 is a prime.

It is a Sophie Germain prime.

Together with 40457491, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40457689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20228744 + 20228745.

It is an arithmetic number, because the mean of its divisors is an integer number (20228745).

Almost surely, 2^40457489 is an apocalyptic number.

It is an amenable number.

40457489 is a deficient number, since it is larger than the sum of its proper divisors (1).

40457489 is an equidigital number, since it uses as much as digits as its factorization.

40457489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 40457489 is about 6360.6201741654. The cubic root of 40457489 is about 343.2940752758.

The spelling of 40457489 in words is "forty million, four hundred fifty-seven thousand, four hundred eighty-nine".