45315989 has 2 divisors, whose sum is σ = 45315990. Its totient is φ = 45315988.

The previous prime is 45315971. The next prime is 45316043. The reversal of 45315989 is 98951354.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35343025 + 9972964 = 5945^2 + 3158^2 .

It is a cyclic number.

It is not a de Polignac number, because 45315989 - 2⁸ = 45315733 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45315929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22657994 + 22657995.

It is an arithmetic number, because the mean of its divisors is an integer number (22657995).

Almost surely, 2^45315989 is an apocalyptic number.

It is an amenable number.

45315989 is a deficient number, since it is larger than the sum of its proper divisors (1).

45315989 is an equidigital number, since it uses as much as digits as its factorization.

45315989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 44.

The square root of 45315989 is about 6731.7151603436. The cubic root of 45315989 is about 356.5199368304.

The spelling of 45315989 in words is "forty-five million, three hundred fifteen thousand, nine hundred eighty-nine".