45292781 has 2 divisors, whose sum is σ = 45292782. Its totient is φ = 45292780.

The previous prime is 45292771. The next prime is 45292783. The reversal of 45292781 is 18729254.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28408900 + 16883881 = 5330^2 + 4109^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45292781 is a prime.

It is a super-2 number, since 2×45292781² = 4102872021427922, which contains 22 as substring.

Together with 45292783, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45292783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22646390 + 22646391.

It is an arithmetic number, because the mean of its divisors is an integer number (22646391).

Almost surely, 2^45292781 is an apocalyptic number.

It is an amenable number.

45292781 is a deficient number, since it is larger than the sum of its proper divisors (1).

45292781 is an equidigital number, since it uses as much as digits as its factorization.

45292781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 45292781 is about 6729.9911589838. The cubic root of 45292781 is about 356.4590640732.

The spelling of 45292781 in words is "forty-five million, two hundred ninety-two thousand, seven hundred eighty-one".