40739557 has 2 divisors, whose sum is σ = 40739558. Its totient is φ = 40739556.

The previous prime is 40739539. The next prime is 40739579. The reversal of 40739557 is 75593704.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35212356 + 5527201 = 5934^2 + 2351^2 .

It is a cyclic number.

It is not a de Polignac number, because 40739557 - 2¹⁹ = 40215269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40739507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20369778 + 20369779.

It is an arithmetic number, because the mean of its divisors is an integer number (20369779).

Almost surely, 2^40739557 is an apocalyptic number.

It is an amenable number.

40739557 is a deficient number, since it is larger than the sum of its proper divisors (1).

40739557 is an equidigital number, since it uses as much as digits as its factorization.

40739557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 132300, while the sum is 40.

The square root of 40739557 is about 6382.7546561026. The cubic root of 40739557 is about 344.0900391901.

The spelling of 40739557 in words is "forty million, seven hundred thirty-nine thousand, five hundred fifty-seven".