45809187 has 4 divisors (see below), whose sum is σ = 61078920. Its totient is φ = 30539456.

The previous prime is 45809167. The next prime is 45809201. The reversal of 45809187 is 78190854.

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 45809187 - 2⁷ = 45809059 is a prime.

It is a super-2 number, since 2×45809187² = 4196963227201938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45809107) 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, 7634862 + ... + 7634867.

It is an arithmetic number, because the mean of its divisors is an integer number (15269730).

Almost surely, 2^45809187 is an apocalyptic number.

45809187 is a deficient number, since it is larger than the sum of its proper divisors (15269733).

45809187 is a wasteful number, since it uses less digits than its factorization.

45809187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15269732.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 45809187 is about 6768.2484440215. The cubic root of 45809187 is about 357.8086714197.

The spelling of 45809187 in words is "forty-five million, eight hundred nine thousand, one hundred eighty-seven".