2951689 has 4 divisors (see below), whose sum is σ = 3178756. Its totient is φ = 2724624.

The previous prime is 2951687. The next prime is 2951699. The reversal of 2951689 is 9861592.

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

It can be written as a sum of positive squares in 2 ways, for example, as 366025 + 2585664 = 605^2 + 1608^2 .

It is a cyclic number.

It is not a de Polignac number, because 2951689 - 2¹ = 2951687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2951687) 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, 113514 + ... + 113539.

It is an arithmetic number, because the mean of its divisors is an integer number (794689).

2^2951689 is an apocalyptic number.

It is an amenable number.

2951689 is a deficient number, since it is larger than the sum of its proper divisors (227067).

2951689 is a wasteful number, since it uses less digits than its factorization.

2951689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227066.

The product of its digits is 38880, while the sum is 40.

The square root of 2951689 is about 1718.0480202835. The cubic root of 2951689 is about 143.4465801721.

Subtracting 2951689 from its reverse (9861592), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 2951689 in words is "two million, nine hundred fifty-one thousand, six hundred eighty-nine".