3081731 has 2 divisors, whose sum is σ = 3081732. Its totient is φ = 3081730.

The previous prime is 3081721. The next prime is 3081737. The reversal of 3081731 is 1371803.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1371803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3081731 - 2¹⁴ = 3065347 is a prime.

It is a super-2 number, since 2×3081731² = 18994131912722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3081697 and 3081706.

It is not a weakly prime, because it can be changed into another prime (3081737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1540865 + 1540866.

It is an arithmetic number, because the mean of its divisors is an integer number (1540866).

Almost surely, 2^3081731 is an apocalyptic number.

3081731 is a deficient number, since it is larger than the sum of its proper divisors (1).

3081731 is an equidigital number, since it uses as much as digits as its factorization.

3081731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 3081731 is about 1755.4859726013. The cubic root of 3081731 is about 145.5229787006.

The spelling of 3081731 in words is "three million, eighty-one thousand, seven hundred thirty-one".