6742991 has 4 divisors (see below), whose sum is σ = 6925272. Its totient is φ = 6560712.

The previous prime is 6742969. The next prime is 6742997. The reversal of 6742991 is 1992476.

6742991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6742991 - 2¹⁴ = 6726607 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 (6742997) 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, 91085 + ... + 91158.

It is an arithmetic number, because the mean of its divisors is an integer number (1731318).

Almost surely, 2^6742991 is an apocalyptic number.

6742991 is a deficient number, since it is larger than the sum of its proper divisors (182281).

6742991 is a wasteful number, since it uses less digits than its factorization.

6742991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182280.

The product of its digits is 27216, while the sum is 38.

The square root of 6742991 is about 2596.7269783325. The cubic root of 6742991 is about 188.9227215957.

The spelling of 6742991 in words is "six million, seven hundred forty-two thousand, nine hundred ninety-one".