45919813 has 2 divisors, whose sum is σ = 45919814. Its totient is φ = 45919812.

The previous prime is 45919801. The next prime is 45919837. The reversal of 45919813 is 31891954.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44116164 + 1803649 = 6642^2 + 1343^2 .

It is a cyclic number.

It is not a de Polignac number, because 45919813 - 2⁵ = 45919781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45919843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22959906 + 22959907.

It is an arithmetic number, because the mean of its divisors is an integer number (22959907).

Almost surely, 2^45919813 is an apocalyptic number.

It is an amenable number.

45919813 is a deficient number, since it is larger than the sum of its proper divisors (1).

45919813 is an equidigital number, since it uses as much as digits as its factorization.

45919813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 40.

The square root of 45919813 is about 6776.4159405987. The cubic root of 45919813 is about 358.0964675584.

The spelling of 45919813 in words is "forty-five million, nine hundred nineteen thousand, eight hundred thirteen".