2906991 has 6 divisors (see below), whose sum is σ = 4199000. Its totient is φ = 1937988.

The previous prime is 2906987. The next prime is 2906999. The reversal of 2906991 is 1996092.

It is not a de Polignac number, because 2906991 - 2² = 2906987 is a prime.

It is a Duffinian number.

2906991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2906999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 161491 + ... + 161508.

2^2906991 is an apocalyptic number.

2906991 is a deficient number, since it is larger than the sum of its proper divisors (1292009).

2906991 is a wasteful number, since it uses less digits than its factorization.

2906991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323005 (or 323002 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 2906991 is about 1704.9900292964. The cubic root of 2906991 is about 142.7188143379.

The spelling of 2906991 in words is "two million, nine hundred six thousand, nine hundred ninety-one".