6849961 has 4 divisors (see below), whose sum is σ = 6855424. Its totient is φ = 6844500.

The previous prime is 6849949. The next prime is 6849971. The reversal of 6849961 is 1699486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1699486 = 2 ⋅849743.

It is a 4-Lehmer number, since φ(6849961) divides (6849961-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 6849961 - 2¹⁷ = 6718889 is a prime.

It is a Duffinian number.

6849961 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6849971) 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, 196 + ... + 3706.

It is an arithmetic number, because the mean of its divisors is an integer number (1713856).

Almost surely, 2^6849961 is an apocalyptic number.

It is an amenable number.

6849961 is a deficient number, since it is larger than the sum of its proper divisors (5463).

6849961 is a wasteful number, since it uses less digits than its factorization.

6849961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5462.

The product of its digits is 93312, while the sum is 43.

The square root of 6849961 is about 2617.2430150829. The cubic root of 6849961 is about 189.9165007061.

The spelling of 6849961 in words is "six million, eight hundred forty-nine thousand, nine hundred sixty-one".