45273909 has 4 divisors (see below), whose sum is σ = 60365216. Its totient is φ = 30182604.

The previous prime is 45273871. The next prime is 45273923. The reversal of 45273909 is 90937254.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 45273909 - 2⁸ = 45273653 is a prime.

It is a super-2 number, since 2×45273909² = 4099453672280562, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45273929) 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, 7545649 + ... + 7545654.

It is an arithmetic number, because the mean of its divisors is an integer number (15091304).

Almost surely, 2^45273909 is an apocalyptic number.

It is an amenable number.

45273909 is a deficient number, since it is larger than the sum of its proper divisors (15091307).

45273909 is a wasteful number, since it uses less digits than its factorization.

45273909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15091306.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 45273909 is about 6728.5889308235. The cubic root of 45273909 is about 356.4095489713.

The spelling of 45273909 in words is "forty-five million, two hundred seventy-three thousand, nine hundred nine".