40490893 has 2 divisors, whose sum is σ = 40490894. Its totient is φ = 40490892.

The previous prime is 40490861. The next prime is 40490909. The reversal of 40490893 is 39809404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36156169 + 4334724 = 6013^2 + 2082^2 .

It is a cyclic number.

It is not a de Polignac number, because 40490893 - 2⁵ = 40490861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40490393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20245446 + 20245447.

It is an arithmetic number, because the mean of its divisors is an integer number (20245447).

Almost surely, 2^40490893 is an apocalyptic number.

It is an amenable number.

40490893 is a deficient number, since it is larger than the sum of its proper divisors (1).

40490893 is an equidigital number, since it uses as much as digits as its factorization.

40490893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 40490893 is about 6363.2454769559. The cubic root of 40490893 is about 343.3885303114.

The spelling of 40490893 in words is "forty million, four hundred ninety thousand, eight hundred ninety-three".