2791631 has 2 divisors, whose sum is σ = 2791632. Its totient is φ = 2791630.

The previous prime is 2791597. The next prime is 2791637. The reversal of 2791631 is 1361972.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2791631 - 2¹⁴ = 2775247 is a prime.

It is a super-2 number, since 2×2791631² = 15586407280322, 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 = 2791594 and 2791603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2791637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1395815 + 1395816.

It is an arithmetic number, because the mean of its divisors is an integer number (1395816).

2^2791631 is an apocalyptic number.

2791631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2791631 is an equidigital number, since it uses as much as digits as its factorization.

2791631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 29.

The square root of 2791631 is about 1670.8174645963. The cubic root of 2791631 is about 140.8054086841.

The spelling of 2791631 in words is "two million, seven hundred ninety-one thousand, six hundred thirty-one".