45947 has 4 divisors (see below), whose sum is σ = 50136. Its totient is φ = 41760.

The previous prime is 45943. The next prime is 45949. The reversal of 45947 is 74954.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 45947 - 2² = 45943 is a prime.

It is a super-2 number, since 2×45947² = 4222253618, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (45943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2078 + ... + 2099.

It is an arithmetic number, because the mean of its divisors is an integer number (12534).

45947 is a Friedman number, since it can be written as 9^4*7+5*4, using all its digits and the basic arithmetic operations.

2⁴⁵⁹⁴⁷ is an apocalyptic number.

45947 is a deficient number, since it is larger than the sum of its proper divisors (4189).

45947 is a wasteful number, since it uses less digits than its factorization.

45947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4188.

The product of its digits is 5040, while the sum is 29.

The square root of 45947 is about 214.3525133979. The cubic root of 45947 is about 35.8167124408.

The spelling of 45947 in words is "forty-five thousand, nine hundred forty-seven".