2192391 has 12 divisors (see below), whose sum is σ = 3333720. Its totient is φ = 1384560.

The previous prime is 2192387. The next prime is 2192417. The reversal of 2192391 is 1932912.

It is not a de Polignac number, because 2192391 - 2² = 2192387 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2192341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6240 + ... + 6581.

It is an arithmetic number, because the mean of its divisors is an integer number (277810).

2^2192391 is an apocalyptic number.

2192391 is a deficient number, since it is larger than the sum of its proper divisors (1141329).

2192391 is a wasteful number, since it uses less digits than its factorization.

2192391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12846 (or 12843 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 2192391 is about 1480.6724823539. The cubic root of 2192391 is about 129.9090290577.

The spelling of 2192391 in words is "two million, one hundred ninety-two thousand, three hundred ninety-one".