44645389 has 2 divisors, whose sum is σ = 44645390. Its totient is φ = 44645388.

The previous prime is 44645387. The next prime is 44645407. The reversal of 44645389 is 98354644.

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., 29106025 + 15539364 = 5395^2 + 3942^2 .

It is a cyclic number.

It is not a de Polignac number, because 44645389 - 2¹ = 44645387 is a prime.

It is a super-2 number, since 2×44645389² = 3986421517922642, which contains 22 as substring.

Together with 44645387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44645387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22322694 + 22322695.

It is an arithmetic number, because the mean of its divisors is an integer number (22322695).

Almost surely, 2^44645389 is an apocalyptic number.

It is an amenable number.

44645389 is a deficient number, since it is larger than the sum of its proper divisors (1).

44645389 is an equidigital number, since it uses as much as digits as its factorization.

44645389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 43.

The square root of 44645389 is about 6681.7205119640. The cubic root of 44645389 is about 354.7525591706.

The spelling of 44645389 in words is "forty-four million, six hundred forty-five thousand, three hundred eighty-nine".