45189649 has 4 divisors (see below), whose sum is σ = 45217264. Its totient is φ = 45162036.

The previous prime is 45189623. The next prime is 45189653. The reversal of 45189649 is 94698154.

It is a happy number.

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: 94698154 = 2 ⋅47349077.

It is a cyclic number.

It is not a de Polignac number, because 45189649 - 2¹³ = 45181457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45189599 and 45189608.

It is not an unprimeable number, because it can be changed into a prime (45189149) 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, 11187 + ... + 14680.

It is an arithmetic number, because the mean of its divisors is an integer number (11304316).

Almost surely, 2^45189649 is an apocalyptic number.

It is an amenable number.

45189649 is a deficient number, since it is larger than the sum of its proper divisors (27615).

45189649 is a wasteful number, since it uses less digits than its factorization.

45189649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27614.

The product of its digits is 311040, while the sum is 46.

The square root of 45189649 is about 6722.3246723139. The cubic root of 45189649 is about 356.1883051469.

It can be divided in two parts, 451 and 89649, that added together give a triangular number (90100 = T₄₂₄).

The spelling of 45189649 in words is "forty-five million, one hundred eighty-nine thousand, six hundred forty-nine".