2191693933 has 24 divisors (see below), whose sum is σ = 2625777504. Its totient is φ = 1816916640.

The previous prime is 2191693877. The next prime is 2191693957. The reversal of 2191693933 is 3393961912.

It is a de Polignac number, because none of the positive numbers 2^k-2191693933 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191693993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122166 + ... + 138952.

It is an arithmetic number, because the mean of its divisors is an integer number (109407396).

Almost surely, 2^2191693933 is an apocalyptic number.

It is an amenable number.

2191693933 is a deficient number, since it is larger than the sum of its proper divisors (434083571).

2191693933 is a wasteful number, since it uses less digits than its factorization.

2191693933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16905 (or 16894 counting only the distinct ones).

The product of its digits is 236196, while the sum is 46.

The square root of 2191693933 is about 46815.5308952061. The cubic root of 2191693933 is about 1298.9525947977.

The spelling of 2191693933 in words is "two billion, one hundred ninety-one million, six hundred ninety-three thousand, nine hundred thirty-three".