45396781 has 2 divisors, whose sum is σ = 45396782. Its totient is φ = 45396780.

The previous prime is 45396763. The next prime is 45396787. The reversal of 45396781 is 18769354.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34703881 + 10692900 = 5891^2 + 3270^2 .

It is a cyclic number.

It is not a de Polignac number, because 45396781 - 2⁷ = 45396653 is a prime.

It is a super-2 number, since 2×45396781² = 4121735450323922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45396787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22698390 + 22698391.

It is an arithmetic number, because the mean of its divisors is an integer number (22698391).

Almost surely, 2^45396781 is an apocalyptic number.

It is an amenable number.

45396781 is a deficient number, since it is larger than the sum of its proper divisors (1).

45396781 is an equidigital number, since it uses as much as digits as its factorization.

45396781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 45396781 is about 6737.7133361401. The cubic root of 45396781 is about 356.7316859173.

The spelling of 45396781 in words is "forty-five million, three hundred ninety-six thousand, seven hundred eighty-one".