45188749 has 8 divisors (see below), whose sum is σ = 46120320. Its totient is φ = 44262816.

The previous prime is 45188723. The next prime is 45188789. The reversal of 45188749 is 94788154.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45188749 - 2⁷ = 45188621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45188699 and 45188708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45188789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17244 + ... + 19690.

It is an arithmetic number, because the mean of its divisors is an integer number (5765040).

Almost surely, 2^45188749 is an apocalyptic number.

It is an amenable number.

45188749 is a deficient number, since it is larger than the sum of its proper divisors (931571).

45188749 is a wasteful number, since it uses less digits than its factorization.

45188749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819.

The product of its digits is 322560, while the sum is 46.

The square root of 45188749 is about 6722.2577308520. The cubic root of 45188749 is about 356.1859405080.

The spelling of 45188749 in words is "forty-five million, one hundred eighty-eight thousand, seven hundred forty-nine".