45378091 has 4 divisors (see below), whose sum is σ = 49503384. Its totient is φ = 41252800.

The previous prime is 45378089. The next prime is 45378097. The reversal of 45378091 is 19087354.

45378091 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 45378091 - 2¹ = 45378089 is a prime.

It is a super-2 number, since 2×45378091² = 4118342285608562, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45378091.

It is not an unprimeable number, because it can be changed into a prime (45378097) 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, 2062630 + ... + 2062651.

It is an arithmetic number, because the mean of its divisors is an integer number (12375846).

Almost surely, 2^45378091 is an apocalyptic number.

45378091 is a deficient number, since it is larger than the sum of its proper divisors (4125293).

45378091 is a wasteful number, since it uses less digits than its factorization.

45378091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4125292.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 45378091 is about 6736.3262242858. The cubic root of 45378091 is about 356.6827233384.

The spelling of 45378091 in words is "forty-five million, three hundred seventy-eight thousand, ninety-one".