45438091 has 4 divisors (see below), whose sum is σ = 45840312. Its totient is φ = 45035872.

The previous prime is 45438079. The next prime is 45438097. The reversal of 45438091 is 19083454.

45438091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 45438091 - 2²⁵ = 11883659 is a prime.

It is a super-2 number, since 2×45438091² = 4129240227448562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45438097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200941 + ... + 201166.

It is an arithmetic number, because the mean of its divisors is an integer number (11460078).

Almost surely, 2^45438091 is an apocalyptic number.

45438091 is a deficient number, since it is larger than the sum of its proper divisors (402221).

45438091 is a wasteful number, since it uses less digits than its factorization.

45438091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402220.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 45438091 is about 6740.7782191673. The cubic root of 45438091 is about 356.8398589191.

The spelling of 45438091 in words is "forty-five million, four hundred thirty-eight thousand, ninety-one".