45638189 has 4 divisors (see below), whose sum is σ = 46319424. Its totient is φ = 44956956.

The previous prime is 45638147. The next prime is 45638227. The reversal of 45638189 is 98183654.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98183654 = 2 ⋅49091827.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45638189 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45638119) 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, 340517 + ... + 340650.

It is an arithmetic number, because the mean of its divisors is an integer number (11579856).

Almost surely, 2^45638189 is an apocalyptic number.

It is an amenable number.

45638189 is a deficient number, since it is larger than the sum of its proper divisors (681235).

45638189 is an equidigital number, since it uses as much as digits as its factorization.

45638189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681234.

The product of its digits is 207360, while the sum is 44.

The square root of 45638189 is about 6755.6042660890. The cubic root of 45638189 is about 357.3629030775.

The spelling of 45638189 in words is "forty-five million, six hundred thirty-eight thousand, one hundred eighty-nine".