2091634 has 12 divisors (see below), whose sum is σ = 3312414. Its totient is φ = 990432.

The previous prime is 2091631. The next prime is 2091637. The reversal of 2091634 is 4361902.

It is an interprime number because it is at equal distance from previous prime (2091631) and next prime (2091637).

It can be written as a sum of positive squares in only one way, i.e., 2030625 + 61009 = 1425^2 + 247^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2091599 and 2091608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 727 + ... + 2170.

2^2091634 is an apocalyptic number.

2091634 is a deficient number, since it is larger than the sum of its proper divisors (1220780).

2091634 is a wasteful number, since it uses less digits than its factorization.

2091634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937 (or 2918 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 2091634 is about 1446.2482497829. The cubic root of 2091634 is about 127.8876373959.

The spelling of 2091634 in words is "two million, ninety-one thousand, six hundred thirty-four".