2945691 has 12 divisors (see below), whose sum is σ = 4862832. Its totient is φ = 1683216.

The previous prime is 2945669. The next prime is 2945707. The reversal of 2945691 is 1965492.

2945691 is a `hidden beast` number, since 2 + 94 + 569 + 1 = 666.

It is not a de Polignac number, because 2945691 - 2⁵ = 2945659 is a prime.

2945691 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2945611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23316 + ... + 23441.

It is an arithmetic number, because the mean of its divisors is an integer number (405236).

2^2945691 is an apocalyptic number.

2945691 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2945691 is a deficient number, since it is larger than the sum of its proper divisors (1917141).

2945691 is a wasteful number, since it uses less digits than its factorization.

2945691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46770 (or 46767 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 2945691 is about 1716.3015469317. The cubic root of 2945691 is about 143.3493504125.

The spelling of 2945691 in words is "two million, nine hundred forty-five thousand, six hundred ninety-one".