40174681 has 2 divisors, whose sum is σ = 40174682. Its totient is φ = 40174680.

The previous prime is 40174679. The next prime is 40174697. The reversal of 40174681 is 18647104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34999056 + 5175625 = 5916^2 + 2275^2 .

It is a cyclic number.

It is not a de Polignac number, because 40174681 - 2¹ = 40174679 is a prime.

It is a super-2 number, since 2×40174681² = 3228009986903522, which contains 22 as substring.

Together with 40174679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40174081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20087340 + 20087341.

It is an arithmetic number, because the mean of its divisors is an integer number (20087341).

Almost surely, 2^40174681 is an apocalyptic number.

It is an amenable number.

40174681 is a deficient number, since it is larger than the sum of its proper divisors (1).

40174681 is an equidigital number, since it uses as much as digits as its factorization.

40174681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 40174681 is about 6338.3500218906. The cubic root of 40174681 is about 342.4923002514.

The spelling of 40174681 in words is "forty million, one hundred seventy-four thousand, six hundred eighty-one".