45249989 has 2 divisors, whose sum is σ = 45249990. Its totient is φ = 45249988.

The previous prime is 45249949. The next prime is 45250027. The reversal of 45249989 is 98994254.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22877089 + 22372900 = 4783^2 + 4730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45249989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45249929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22624994 + 22624995.

It is an arithmetic number, because the mean of its divisors is an integer number (22624995).

Almost surely, 2^45249989 is an apocalyptic number.

It is an amenable number.

45249989 is a deficient number, since it is larger than the sum of its proper divisors (1).

45249989 is an equidigital number, since it uses as much as digits as its factorization.

45249989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 50.

The square root of 45249989 is about 6726.8112059132. The cubic root of 45249989 is about 356.3467694848.

The spelling of 45249989 in words is "forty-five million, two hundred forty-nine thousand, nine hundred eighty-nine".