40547657 has 2 divisors, whose sum is σ = 40547658. Its totient is φ = 40547656.

The previous prime is 40547651. The next prime is 40547681. The reversal of 40547657 is 75674504.

40547657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26790976 + 13756681 = 5176^2 + 3709^2 .

It is a cyclic number.

It is not a de Polignac number, because 40547657 - 2⁴ = 40547641 is a prime.

It is a super-2 number, since 2×40547657² = 3288224976379298, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40547657.

It is not a weakly prime, because it can be changed into another prime (40547651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20273828 + 20273829.

It is an arithmetic number, because the mean of its divisors is an integer number (20273829).

Almost surely, 2^40547657 is an apocalyptic number.

It is an amenable number.

40547657 is a deficient number, since it is larger than the sum of its proper divisors (1).

40547657 is an equidigital number, since it uses as much as digits as its factorization.

40547657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 117600, while the sum is 38.

The square root of 40547657 is about 6367.7042173769. The cubic root of 40547657 is about 343.5489203279.

It can be divided in two parts, 4054 and 7657, that added together give a palindrome (11711).

The spelling of 40547657 in words is "forty million, five hundred forty-seven thousand, six hundred fifty-seven".