45938209 has 2 divisors, whose sum is σ = 45938210. Its totient is φ = 45938208.

The previous prime is 45938197. The next prime is 45938213. The reversal of 45938209 is 90283954.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38254225 + 7683984 = 6185^2 + 2772^2 .

It is a cyclic number.

It is not a de Polignac number, because 45938209 - 2¹⁵ = 45905441 is a prime.

It is a super-2 number, since 2×45938209² = 4220638092255362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (45938509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22969104 + 22969105.

It is an arithmetic number, because the mean of its divisors is an integer number (22969105).

Almost surely, 2^45938209 is an apocalyptic number.

It is an amenable number.

45938209 is a deficient number, since it is larger than the sum of its proper divisors (1).

45938209 is an equidigital number, since it uses as much as digits as its factorization.

45938209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 45938209 is about 6777.7731593791. The cubic root of 45938209 is about 358.1442803484.

The spelling of 45938209 in words is "forty-five million, nine hundred thirty-eight thousand, two hundred nine".