2991706 has 4 divisors (see below), whose sum is σ = 4487562. Its totient is φ = 1495852.

The previous prime is 2991701. The next prime is 2991707. The reversal of 2991706 is 6071992.

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

It can be written as a sum of positive squares in only one way, i.e., 2907025 + 84681 = 1705^2 + 291^2 .

It is not an unprimeable number, because it can be changed into a prime (2991701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 747925 + ... + 747928.

2^2991706 is an apocalyptic number.

2991706 is a deficient number, since it is larger than the sum of its proper divisors (1495856).

2991706 is a wasteful number, since it uses less digits than its factorization.

2991706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495855.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 2991706 is about 1729.6548788703. The cubic root of 2991706 is about 144.0919230467.

The spelling of 2991706 in words is "two million, nine hundred ninety-one thousand, seven hundred six".