2136749 has 4 divisors (see below), whose sum is σ = 2210460. Its totient is φ = 2063040.

The previous prime is 2136733. The next prime is 2136773. The reversal of 2136749 is 9476312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 611524 + 1525225 = 782^2 + 1235^2 .

It is a cyclic number.

It is not a de Polignac number, because 2136749 - 2⁴ = 2136733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2136779) 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, 36812 + ... + 36869.

It is an arithmetic number, because the mean of its divisors is an integer number (552615).

2^2136749 is an apocalyptic number.

2136749 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2136749 is a deficient number, since it is larger than the sum of its proper divisors (73711).

2136749 is an equidigital number, since it uses as much as digits as its factorization.

2136749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73710.

The product of its digits is 9072, while the sum is 32.

The square root of 2136749 is about 1461.7622925770. The cubic root of 2136749 is about 128.8005852693.

The spelling of 2136749 in words is "two million, one hundred thirty-six thousand, seven hundred forty-nine".