2991903 has 16 divisors (see below), whose sum is σ = 4202496. Its totient is φ = 1890720.

The previous prime is 2991899. The next prime is 2991907. The reversal of 2991903 is 3091992.

It is an interprime number because it is at equal distance from previous prime (2991899) and next prime (2991907).

It is not a de Polignac number, because 2991903 - 2² = 2991899 is a prime.

It is a super-2 number, since 2×2991903² = 17902967122818, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2991907) 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, 4626 + ... + 5232.

It is an arithmetic number, because the mean of its divisors is an integer number (262656).

2^2991903 is an apocalyptic number.

2991903 is a deficient number, since it is larger than the sum of its proper divisors (1210593).

2991903 is a wasteful number, since it uses less digits than its factorization.

2991903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694.

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 2991903 is about 1729.7118257097. The cubic root of 2991903 is about 144.0950857333.

The spelling of 2991903 in words is "two million, nine hundred ninety-one thousand, nine hundred three".