45641947 has 4 divisors (see below), whose sum is σ = 49152880. Its totient is φ = 42131016.

The previous prime is 45641929. The next prime is 45641983. The reversal of 45641947 is 74914654.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74914654 = 2 ⋅37457327.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45641947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45641917) 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, 1755447 + ... + 1755472.

It is an arithmetic number, because the mean of its divisors is an integer number (12288220).

Almost surely, 2^45641947 is an apocalyptic number.

45641947 is a deficient number, since it is larger than the sum of its proper divisors (3510933).

45641947 is a wasteful number, since it uses less digits than its factorization.

45641947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510932.

The product of its digits is 120960, while the sum is 40.

The square root of 45641947 is about 6755.8823998054. The cubic root of 45641947 is about 357.3727116242.

The spelling of 45641947 in words is "forty-five million, six hundred forty-one thousand, nine hundred forty-seven".