2947989 has 16 divisors (see below), whose sum is σ = 4322880. Its totient is φ = 1772160.

The previous prime is 2947949. The next prime is 2947999. The reversal of 2947989 is 9897492.

It is a happy number.

It is not a de Polignac number, because 2947989 - 2¹¹ = 2945941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2947939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4897 + ... + 5465.

It is an arithmetic number, because the mean of its divisors is an integer number (270180).

2^2947989 is an apocalyptic number.

It is an amenable number.

2947989 is a deficient number, since it is larger than the sum of its proper divisors (1374891).

2947989 is a wasteful number, since it uses less digits than its factorization.

2947989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740.

The product of its digits is 326592, while the sum is 48.

The square root of 2947989 is about 1716.9708791939. The cubic root of 2947989 is about 143.3866174105.

The spelling of 2947989 in words is "two million, nine hundred forty-seven thousand, nine hundred eighty-nine".