244693681 has 2 divisors, whose sum is σ = 244693682. Its totient is φ = 244693680.

The previous prime is 244693679. The next prime is 244693717. The reversal of 244693681 is 186396442.

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., 196252081 + 48441600 = 14009^2 + 6960^2 .

It is a cyclic number.

It is not a de Polignac number, because 244693681 - 2¹ = 244693679 is a prime.

It is a super-2 number, since 2×244693681² = 119749995042659522, which contains 22 as substring.

Together with 244693679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (244693601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122346840 + 122346841.

It is an arithmetic number, because the mean of its divisors is an integer number (122346841).

Almost surely, 2^244693681 is an apocalyptic number.

It is an amenable number.

244693681 is a deficient number, since it is larger than the sum of its proper divisors (1).

244693681 is an equidigital number, since it uses as much as digits as its factorization.

244693681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 43.

The square root of 244693681 is about 15642.6877805574. The cubic root of 244693681 is about 625.4715852023.

The spelling of 244693681 in words is "two hundred forty-four million, six hundred ninety-three thousand, six hundred eighty-one".