3678131731 has 2 divisors, whose sum is σ = 3678131732. Its totient is φ = 3678131730.

The previous prime is 3678131729. The next prime is 3678131773. The reversal of 3678131731 is 1371318763.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3678131731 - 2¹ = 3678131729 is a prime.

It is a super-2 number, since 2×3678131731² = 27057306061178112722, which contains 22 as substring.

Together with 3678131729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3678101731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1839065865 + 1839065866.

It is an arithmetic number, because the mean of its divisors is an integer number (1839065866).

Almost surely, 2^3678131731 is an apocalyptic number.

3678131731 is a deficient number, since it is larger than the sum of its proper divisors (1).

3678131731 is an equidigital number, since it uses as much as digits as its factorization.

3678131731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 40.

The square root of 3678131731 is about 60647.6028462791. The cubic root of 3678131731 is about 1543.6272136143.

The spelling of 3678131731 in words is "three billion, six hundred seventy-eight million, one hundred thirty-one thousand, seven hundred thirty-one".