45451309 has 2 divisors, whose sum is σ = 45451310. Its totient is φ = 45451308.

The previous prime is 45451297. The next prime is 45451327. The reversal of 45451309 is 90315454.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44595684 + 855625 = 6678^2 + 925^2 .

It is a cyclic number.

It is not a de Polignac number, because 45451309 - 2⁵ = 45451277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45451909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22725654 + 22725655.

It is an arithmetic number, because the mean of its divisors is an integer number (22725655).

Almost surely, 2^45451309 is an apocalyptic number.

It is an amenable number.

45451309 is a deficient number, since it is larger than the sum of its proper divisors (1).

45451309 is an equidigital number, since it uses as much as digits as its factorization.

45451309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 45451309 is about 6741.7585984667. The cubic root of 45451309 is about 356.8744572914.

The spelling of 45451309 in words is "forty-five million, four hundred fifty-one thousand, three hundred nine".