45978947 has 8 divisors (see below), whose sum is σ = 52668000. Its totient is φ = 39320064.

The previous prime is 45978943. The next prime is 45978973. The reversal of 45978947 is 74987954.

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

It is not a de Polignac number, because 45978947 - 2² = 45978943 is a prime.

It is a super-2 number, since 2×45978947² = 4228127134457618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45978943) 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, 4172 + ... + 10457.

It is an arithmetic number, because the mean of its divisors is an integer number (6583500).

Almost surely, 2^45978947 is an apocalyptic number.

45978947 is a deficient number, since it is larger than the sum of its proper divisors (6689053).

45978947 is a wasteful number, since it uses less digits than its factorization.

45978947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15085.

The product of its digits is 2540160, while the sum is 53.

The square root of 45978947 is about 6780.7777577502. Note that the first 4 decimals coincide. The cubic root of 45978947 is about 358.2501165090.

The spelling of 45978947 in words is "forty-five million, nine hundred seventy-eight thousand, nine hundred forty-seven".