2947993 has 4 divisors (see below), whose sum is σ = 2951440. Its totient is φ = 2944548.

The previous prime is 2947949. The next prime is 2947999. The reversal of 2947993 is 3997492.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2947993 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2947999) 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, 646 + ... + 2512.

It is an arithmetic number, because the mean of its divisors is an integer number (737860).

2^2947993 is an apocalyptic number.

It is an amenable number.

2947993 is a deficient number, since it is larger than the sum of its proper divisors (3447).

2947993 is a wasteful number, since it uses less digits than its factorization.

2947993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3446.

The product of its digits is 122472, while the sum is 43.

The square root of 2947993 is about 1716.9720440357. The cubic root of 2947993 is about 143.3866822622.

The spelling of 2947993 in words is "two million, nine hundred forty-seven thousand, nine hundred ninety-three".