6961849091 has 4 divisors (see below), whose sum is σ = 6972676872. Its totient is φ = 6951021312.

The previous prime is 6961849049. The next prime is 6961849189. The reversal of 6961849091 is 1909481696.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6961849091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6961849891) 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, 5412926 + ... + 5414211.

It is an arithmetic number, because the mean of its divisors is an integer number (1743169218).

Almost surely, 2^6961849091 is an apocalyptic number.

6961849091 is a deficient number, since it is larger than the sum of its proper divisors (10827781).

6961849091 is a wasteful number, since it uses less digits than its factorization.

6961849091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10827780.

The product of its (nonzero) digits is 839808, while the sum is 53.

The square root of 6961849091 is about 83437.6958634405. The cubic root of 6961849091 is about 1909.4496089632.

The spelling of 6961849091 in words is "six billion, nine hundred sixty-one million, eight hundred forty-nine thousand, ninety-one".