45307819 has 4 divisors (see below), whose sum is σ = 45522760. Its totient is φ = 45092880.

The previous prime is 45307817. The next prime is 45307877. The reversal of 45307819 is 91870354.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 45307819 - 2¹ = 45307817 is a prime.

It is a super-2 number, since 2×45307819² = 4105596925073522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45307817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107154 + ... + 107575.

It is an arithmetic number, because the mean of its divisors is an integer number (11380690).

Almost surely, 2^45307819 is an apocalyptic number.

45307819 is a deficient number, since it is larger than the sum of its proper divisors (214941).

45307819 is a wasteful number, since it uses less digits than its factorization.

45307819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214940.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 45307819 is about 6731.1083039868. The cubic root of 45307819 is about 356.4985099344.

The spelling of 45307819 in words is "forty-five million, three hundred seven thousand, eight hundred nineteen".