40730581 has 2 divisors, whose sum is σ = 40730582. Its totient is φ = 40730580.

The previous prime is 40730567. The next prime is 40730593. The reversal of 40730581 is 18503704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36108081 + 4622500 = 6009^2 + 2150^2 .

It is a cyclic number.

It is not a de Polignac number, because 40730581 - 2⁵ = 40730549 is a prime.

It is a super-2 number, since 2×40730581² = 3317960457195122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40730561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20365290 + 20365291.

It is an arithmetic number, because the mean of its divisors is an integer number (20365291).

Almost surely, 2^40730581 is an apocalyptic number.

It is an amenable number.

40730581 is a deficient number, since it is larger than the sum of its proper divisors (1).

40730581 is an equidigital number, since it uses as much as digits as its factorization.

40730581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 40730581 is about 6382.0514726849. The cubic root of 40730581 is about 344.0647666272.

The spelling of 40730581 in words is "forty million, seven hundred thirty thousand, five hundred eighty-one".