2156923 has 8 divisors (see below), whose sum is σ = 2233088. Its totient is φ = 2082024.

The previous prime is 2156897. The next prime is 2156939. The reversal of 2156923 is 3296512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2156923 - 2²¹ = 59771 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2156891 and 2156900.

It is not an unprimeable number, because it can be changed into a prime (2156993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4186 + ... + 4672.

It is an arithmetic number, because the mean of its divisors is an integer number (279136).

2^2156923 is an apocalyptic number.

2156923 is a deficient number, since it is larger than the sum of its proper divisors (76165).

2156923 is a wasteful number, since it uses less digits than its factorization.

2156923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633.

The product of its digits is 3240, while the sum is 28.

The square root of 2156923 is about 1468.6466559387. The cubic root of 2156923 is about 129.2046707919.

The spelling of 2156923 in words is "two million, one hundred fifty-six thousand, nine hundred twenty-three".