45918289 has 2 divisors, whose sum is σ = 45918290. Its totient is φ = 45918288.

The previous prime is 45918287. The next prime is 45918293. The reversal of 45918289 is 98281954.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24601600 + 21316689 = 4960^2 + 4617^2 .

It is a cyclic number.

It is not a de Polignac number, because 45918289 - 2¹ = 45918287 is a prime.

Together with 45918287, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (45918283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22959144 + 22959145.

It is an arithmetic number, because the mean of its divisors is an integer number (22959145).

Almost surely, 2^45918289 is an apocalyptic number.

It is an amenable number.

45918289 is a deficient number, since it is larger than the sum of its proper divisors (1).

45918289 is an equidigital number, since it uses as much as digits as its factorization.

45918289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 46.

The square root of 45918289 is about 6776.3034908422. The cubic root of 45918289 is about 358.0925059783.

It can be divided in two parts, 4591 and 8289, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 45918289 in words is "forty-five million, nine hundred eighteen thousand, two hundred eighty-nine".