45749681 has 2 divisors, whose sum is σ = 45749682. Its totient is φ = 45749680.

The previous prime is 45749647. The next prime is 45749687. The reversal of 45749681 is 18694754.

45749681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35509681 + 10240000 = 5959^2 + 3200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45749681 is a prime.

It is a super-2 number, since 2×45749681² = 4186066623203522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (45749687) 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, 22874840 + 22874841.

It is an arithmetic number, because the mean of its divisors is an integer number (22874841).

Almost surely, 2^45749681 is an apocalyptic number.

It is an amenable number.

45749681 is a deficient number, since it is larger than the sum of its proper divisors (1).

45749681 is an equidigital number, since it uses as much as digits as its factorization.

45749681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 44.

The square root of 45749681 is about 6763.8510480347. The cubic root of 45749681 is about 357.6536734803.

The spelling of 45749681 in words is "forty-five million, seven hundred forty-nine thousand, six hundred eighty-one".