731374681 has 2 divisors, whose sum is σ = 731374682. Its totient is φ = 731374680.

The previous prime is 731374673. The next prime is 731374727. The reversal of 731374681 is 186473137.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 729000000 + 2374681 = 27000^2 + 1541^2 .

It is a cyclic number.

It is not a de Polignac number, because 731374681 - 2³ = 731374673 is a prime.

It is a super-2 number, since 2×731374681² = 1069817848015703522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (731374181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365687340 + 365687341.

It is an arithmetic number, because the mean of its divisors is an integer number (365687341).

Almost surely, 2^731374681 is an apocalyptic number.

It is an amenable number.

731374681 is a deficient number, since it is larger than the sum of its proper divisors (1).

731374681 is an equidigital number, since it uses as much as digits as its factorization.

731374681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 40.

The square root of 731374681 is about 27043.9398202259. The cubic root of 731374681 is about 900.9761757975.

The spelling of 731374681 in words is "seven hundred thirty-one million, three hundred seventy-four thousand, six hundred eighty-one".