2634691 has 2 divisors, whose sum is σ = 2634692. Its totient is φ = 2634690.

The previous prime is 2634689. The next prime is 2634707. The reversal of 2634691 is 1964362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2634691 - 2¹ = 2634689 is a prime.

Together with 2634689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2634631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1317345 + 1317346.

It is an arithmetic number, because the mean of its divisors is an integer number (1317346).

2^2634691 is an apocalyptic number.

2634691 is a deficient number, since it is larger than the sum of its proper divisors (1).

2634691 is an equidigital number, since it uses as much as digits as its factorization.

2634691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 2634691 is about 1623.1731269338. The cubic root of 2634691 is about 138.1157573854.

Subtracting from 2634691 its sum of digits (31), we obtain a triangular number (2634660 = T₂₂₉₅).

The spelling of 2634691 in words is "two million, six hundred thirty-four thousand, six hundred ninety-one".