6905749 has 4 divisors (see below), whose sum is σ = 7019020. Its totient is φ = 6792480.

The previous prime is 6905737. The next prime is 6905771. The reversal of 6905749 is 9475096.

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 2537649 + 4368100 = 1593^2 + 2090^2 .

It is a cyclic number.

It is not a de Polignac number, because 6905749 - 2⁹ = 6905237 is a prime.

It is a Duffinian number.

6905749 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6905729) 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, 56544 + ... + 56665.

It is an arithmetic number, because the mean of its divisors is an integer number (1754755).

Almost surely, 2^6905749 is an apocalyptic number.

It is an amenable number.

6905749 is a deficient number, since it is larger than the sum of its proper divisors (113271).

6905749 is a wasteful number, since it uses less digits than its factorization.

6905749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113270.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 6905749 is about 2627.8791829154. The cubic root of 6905749 is about 190.4306850511.

The spelling of 6905749 in words is "six million, nine hundred five thousand, seven hundred forty-nine".