44378681 has 2 divisors, whose sum is σ = 44378682. Its totient is φ = 44378680.

The previous prime is 44378627. The next prime is 44378717. The reversal of 44378681 is 18687344.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42250000 + 2128681 = 6500^2 + 1459^2 .

It is a cyclic number.

It is not a de Polignac number, because 44378681 - 2⁶ = 44378617 is a prime.

It is a super-2 number, since 2×44378681² = 3938934654599522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (44078681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22189340 + 22189341.

It is an arithmetic number, because the mean of its divisors is an integer number (22189341).

Almost surely, 2^44378681 is an apocalyptic number.

It is an amenable number.

44378681 is a deficient number, since it is larger than the sum of its proper divisors (1).

44378681 is an equidigital number, since it uses as much as digits as its factorization.

44378681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 41.

The square root of 44378681 is about 6661.7325824443. The cubic root of 44378681 is about 354.0447265989.

The spelling of 44378681 in words is "forty-four million, three hundred seventy-eight thousand, six hundred eighty-one".