3691031 has 2 divisors, whose sum is σ = 3691032. Its totient is φ = 3691030.

The previous prime is 3691027. The next prime is 3691043. The reversal of 3691031 is 1301963.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3691031 - 2² = 3691027 is a prime.

It is a super-2 number, since 2×3691031² = 27247419685922, 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 = 3690988 and 3691006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3691021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1845515 + 1845516.

It is an arithmetic number, because the mean of its divisors is an integer number (1845516).

Almost surely, 2^3691031 is an apocalyptic number.

3691031 is a deficient number, since it is larger than the sum of its proper divisors (1).

3691031 is an equidigital number, since it uses as much as digits as its factorization.

3691031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 3691031 is about 1921.2056110682. The cubic root of 3691031 is about 154.5429616983.

Adding to 3691031 its reverse (1301963), we get a palindrome (4992994).

The spelling of 3691031 in words is "three million, six hundred ninety-one thousand, thirty-one".