145183091 has 4 divisors (see below), whose sum is σ = 148724184. Its totient is φ = 141642000.

The previous prime is 145183069. The next prime is 145183097. The reversal of 145183091 is 190381541.

145183091 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 145183091 - 2¹⁸ = 144920947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145183097) 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, 1770485 + ... + 1770566.

It is an arithmetic number, because the mean of its divisors is an integer number (37181046).

Almost surely, 2^145183091 is an apocalyptic number.

145183091 is a deficient number, since it is larger than the sum of its proper divisors (3541093).

145183091 is an equidigital number, since it uses as much as digits as its factorization.

145183091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3541092.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 145183091 is about 12049.1946203885. The cubic root of 145183091 is about 525.5798171538.

The spelling of 145183091 in words is "one hundred forty-five million, one hundred eighty-three thousand, ninety-one".