45149789 has 4 divisors (see below), whose sum is σ = 45657180. Its totient is φ = 44642400.

The previous prime is 45149779. The next prime is 45149791. The reversal of 45149789 is 98794154.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7425625 + 37724164 = 2725^2 + 6142^2 .

It is a de Polignac number, because none of the positive numbers 2^k-45149789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45149749) 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, 253562 + ... + 253739.

It is an arithmetic number, because the mean of its divisors is an integer number (11414295).

Almost surely, 2^45149789 is an apocalyptic number.

It is an amenable number.

45149789 is a deficient number, since it is larger than the sum of its proper divisors (507391).

45149789 is an equidigital number, since it uses as much as digits as its factorization.

45149789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507390.

The product of its digits is 362880, while the sum is 47.

The square root of 45149789 is about 6719.3592700495. The cubic root of 45149789 is about 356.0835478068.

The spelling of 45149789 in words is "forty-five million, one hundred forty-nine thousand, seven hundred eighty-nine".