45642309 has 4 divisors (see below), whose sum is σ = 60856416. Its totient is φ = 30428204.

The previous prime is 45642293. The next prime is 45642319. The reversal of 45642309 is 90324654.

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 a cyclic number.

It is not a de Polignac number, because 45642309 - 2⁴ = 45642293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 45642309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45642319) 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, 7607049 + ... + 7607054.

It is an arithmetic number, because the mean of its divisors is an integer number (15214104).

Almost surely, 2^45642309 is an apocalyptic number.

It is an amenable number.

45642309 is a deficient number, since it is larger than the sum of its proper divisors (15214107).

45642309 is a wasteful number, since it uses less digits than its factorization.

45642309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15214106.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 45642309 is about 6755.9091912192. The cubic root of 45642309 is about 357.3736564318.

The spelling of 45642309 in words is "forty-five million, six hundred forty-two thousand, three hundred nine".