2905631 has 2 divisors, whose sum is σ = 2905632. Its totient is φ = 2905630.

The previous prime is 2905627. The next prime is 2905667. The reversal of 2905631 is 1365092.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2905631 - 2² = 2905627 is a prime.

It is a super-2 number, since 2×2905631² = 16885383016322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2905631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2905601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1452815 + 1452816.

It is an arithmetic number, because the mean of its divisors is an integer number (1452816).

2^2905631 is an apocalyptic number.

2905631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2905631 is an equidigital number, since it uses as much as digits as its factorization.

2905631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 2905631 is about 1704.5911533268. The cubic root of 2905631 is about 142.6965544520.

The spelling of 2905631 in words is "two million, nine hundred five thousand, six hundred thirty-one".