2154993 has 4 divisors (see below), whose sum is σ = 2873328. Its totient is φ = 1436660.

The previous prime is 2154979. The next prime is 2155003. The reversal of 2154993 is 3994512.

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.

It is a cyclic number.

It is not a de Polignac number, because 2154993 - 2¹⁶ = 2089457 is a prime.

It is a D-number.

2154993 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2154913) 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, 359163 + ... + 359168.

It is an arithmetic number, because the mean of its divisors is an integer number (718332).

2^2154993 is an apocalyptic number.

It is an amenable number.

2154993 is a deficient number, since it is larger than the sum of its proper divisors (718335).

2154993 is an equidigital number, since it uses as much as digits as its factorization.

2154993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718334.

The product of its digits is 9720, while the sum is 33.

The square root of 2154993 is about 1467.9894413789. The cubic root of 2154993 is about 129.1661221390.

The spelling of 2154993 in words is "two million, one hundred fifty-four thousand, nine hundred ninety-three".