2691671 has 4 divisors (see below), whose sum is σ = 2754312. Its totient is φ = 2629032.

The previous prime is 2691659. The next prime is 2691677. The reversal of 2691671 is 1761962.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1761962 = 2 ⋅880981.

It is a cyclic number.

It is not a de Polignac number, because 2691671 - 2¹⁸ = 2429527 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2691677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31256 + ... + 31341.

It is an arithmetic number, because the mean of its divisors is an integer number (688578).

2^2691671 is an apocalyptic number.

2691671 is a deficient number, since it is larger than the sum of its proper divisors (62641).

2691671 is an equidigital number, since it uses as much as digits as its factorization.

2691671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62640.

The product of its digits is 4536, while the sum is 32.

The square root of 2691671 is about 1640.6312809404. The cubic root of 2691671 is about 139.1043331031.

The spelling of 2691671 in words is "two million, six hundred ninety-one thousand, six hundred seventy-one".