44918681 has 2 divisors, whose sum is σ = 44918682. Its totient is φ = 44918680.

The previous prime is 44918669. The next prime is 44918683. The reversal of 44918681 is 18681944.

Added to its reverse (18681944) it gives a square (63600625 = 7975²).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39438400 + 5480281 = 6280^2 + 2341^2 .

It is a cyclic number.

It is not a de Polignac number, because 44918681 - 2²² = 40724377 is a prime.

It is a super-2 number, since 2×44918681² = 4035375805559522, which contains 22 as substring.

Together with 44918683, 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 (44918683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22459340 + 22459341.

It is an arithmetic number, because the mean of its divisors is an integer number (22459341).

Almost surely, 2^44918681 is an apocalyptic number.

It is an amenable number.

44918681 is a deficient number, since it is larger than the sum of its proper divisors (1).

44918681 is an equidigital number, since it uses as much as digits as its factorization.

44918681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 41.

The square root of 44918681 is about 6702.1400313631. The cubic root of 44918681 is about 355.4749471816.

Adding to 44918681 its reverse (18681944), we get a square (63600625 = 7975²).

The spelling of 44918681 in words is "forty-four million, nine hundred eighteen thousand, six hundred eighty-one".