45672989 has 2 divisors, whose sum is σ = 45672990. Its totient is φ = 45672988.

The previous prime is 45672943. The next prime is 45673003. The reversal of 45672989 is 98927654.

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., 42680089 + 2992900 = 6533^2 + 1730^2 .

It is a cyclic number.

It is not a de Polignac number, because 45672989 - 2²⁰ = 44624413 is a prime.

It is a Sophie Germain prime.

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

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45672919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22836494 + 22836495.

It is an arithmetic number, because the mean of its divisors is an integer number (22836495).

Almost surely, 2^45672989 is an apocalyptic number.

It is an amenable number.

45672989 is a deficient number, since it is larger than the sum of its proper divisors (1).

45672989 is an equidigital number, since it uses as much as digits as its factorization.

45672989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 50.

The square root of 45672989 is about 6758.1794146057. The cubic root of 45672989 is about 357.4537120373.

The spelling of 45672989 in words is "forty-five million, six hundred seventy-two thousand, nine hundred eighty-nine".