45691813 has 2 divisors, whose sum is σ = 45691814. Its totient is φ = 45691812.

The previous prime is 45691771. The next prime is 45691817. The reversal of 45691813 is 31819654.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45603009 + 88804 = 6753^2 + 298^2 .

It is a cyclic number.

It is not a de Polignac number, because 45691813 - 2⁹ = 45691301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45691817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22845906 + 22845907.

It is an arithmetic number, because the mean of its divisors is an integer number (22845907).

Almost surely, 2^45691813 is an apocalyptic number.

It is an amenable number.

45691813 is a deficient number, since it is larger than the sum of its proper divisors (1).

45691813 is an equidigital number, since it uses as much as digits as its factorization.

45691813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 37.

The square root of 45691813 is about 6759.5719539036. The cubic root of 45691813 is about 357.5028131554.

The spelling of 45691813 in words is "forty-five million, six hundred ninety-one thousand, eight hundred thirteen".