2137643 has 4 divisors (see below), whose sum is σ = 2230608. Its totient is φ = 2044680.

The previous prime is 2137637. The next prime is 2137669. The reversal of 2137643 is 3467312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2137643 - 2⁴ = 2137627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2137613) 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, 46448 + ... + 46493.

It is an arithmetic number, because the mean of its divisors is an integer number (557652).

2^2137643 is an apocalyptic number.

2137643 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2137643 is a deficient number, since it is larger than the sum of its proper divisors (92965).

2137643 is an equidigital number, since it uses as much as digits as its factorization.

2137643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92964.

The product of its digits is 3024, while the sum is 26.

The square root of 2137643 is about 1462.0680558715. The cubic root of 2137643 is about 128.8185458358.

The spelling of 2137643 in words is "two million, one hundred thirty-seven thousand, six hundred forty-three".