2918731 has 2 divisors, whose sum is σ = 2918732. Its totient is φ = 2918730.

The previous prime is 2918719. The next prime is 2918737. The reversal of 2918731 is 1378192.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2918731 - 2⁷ = 2918603 is a prime.

It is a super-2 number, since 2×2918731² = 17037981300722, which contains 22 as substring.

2918731 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2918693 and 2918702.

It is not a weakly prime, because it can be changed into another prime (2918737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1459365 + 1459366.

It is an arithmetic number, because the mean of its divisors is an integer number (1459366).

2^2918731 is an apocalyptic number.

2918731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2918731 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 11 representation: 2918731 = (1713982)₁₁.

2918731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 31.

The square root of 2918731 is about 1708.4293956731. The cubic root of 2918731 is about 142.9106815042.

The spelling of 2918731 in words is "two million, nine hundred eighteen thousand, seven hundred thirty-one".