45239647 has 4 divisors (see below), whose sum is σ = 45276840. Its totient is φ = 45202456.

The previous prime is 45239639. The next prime is 45239651. The reversal of 45239647 is 74693254.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74693254 = 2 ⋅37346627.

It is a cyclic number.

It is not a de Polignac number, because 45239647 - 2³ = 45239639 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45239657) 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, 16708 + ... + 19225.

It is an arithmetic number, because the mean of its divisors is an integer number (11319210).

Almost surely, 2^45239647 is an apocalyptic number.

45239647 is a deficient number, since it is larger than the sum of its proper divisors (37193).

45239647 is a wasteful number, since it uses less digits than its factorization.

45239647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37192.

The product of its digits is 181440, while the sum is 40.

The square root of 45239647 is about 6726.0424470858. The cubic root of 45239647 is about 356.3196194297.

The spelling of 45239647 in words is "forty-five million, two hundred thirty-nine thousand, six hundred forty-seven".