2991959 has 4 divisors (see below), whose sum is σ = 3095160. Its totient is φ = 2888760.

The previous prime is 2991929. The next prime is 2991971. The reversal of 2991959 is 9591992.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2991959 - 2¹² = 2987863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2991929) 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, 51557 + ... + 51614.

It is an arithmetic number, because the mean of its divisors is an integer number (773790).

2^2991959 is an apocalyptic number.

2991959 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2991959 is a deficient number, since it is larger than the sum of its proper divisors (103201).

2991959 is a wasteful number, since it uses less digits than its factorization.

2991959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103200.

The product of its digits is 65610, while the sum is 44.

The square root of 2991959 is about 1729.7280133015. The cubic root of 2991959 is about 144.0959847458.

The spelling of 2991959 in words is "two million, nine hundred ninety-one thousand, nine hundred fifty-nine".