40459381 has 2 divisors, whose sum is σ = 40459382. Its totient is φ = 40459380.

The previous prime is 40459373. The next prime is 40459399. The reversal of 40459381 is 18395404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40436881 + 22500 = 6359^2 + 150^2 .

It is a cyclic number.

It is not a de Polignac number, because 40459381 - 2³ = 40459373 is a prime.

It is a super-2 number, since 2×40459381² = 3273923021806322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40459351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20229690 + 20229691.

It is an arithmetic number, because the mean of its divisors is an integer number (20229691).

Almost surely, 2^40459381 is an apocalyptic number.

It is an amenable number.

40459381 is a deficient number, since it is larger than the sum of its proper divisors (1).

40459381 is an equidigital number, since it uses as much as digits as its factorization.

40459381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 40459381 is about 6360.7689000623. The cubic root of 40459381 is about 343.2994265905.

The spelling of 40459381 in words is "forty million, four hundred fifty-nine thousand, three hundred eighty-one".