2923649 has 4 divisors (see below), whose sum is σ = 2949636. Its totient is φ = 2897664.

The previous prime is 2923633. The next prime is 2923651. The reversal of 2923649 is 9463292.

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 552049 + 2371600 = 743^2 + 1540^2 .

It is a cyclic number.

It is not a de Polignac number, because 2923649 - 2⁴ = 2923633 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹⁹ + 9² + 2¹⁹ + 3¹³ + 6⁷ + 4 + 9³ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2923619) 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, 12824 + ... + 13049.

It is an arithmetic number, because the mean of its divisors is an integer number (737409).

2^2923649 is an apocalyptic number.

It is an amenable number.

2923649 is a deficient number, since it is larger than the sum of its proper divisors (25987).

2923649 is a wasteful number, since it uses less digits than its factorization.

2923649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25986.

The product of its digits is 23328, while the sum is 35.

The square root of 2923649 is about 1709.8681235698. The cubic root of 2923649 is about 142.9909036221.

The spelling of 2923649 in words is "two million, nine hundred twenty-three thousand, six hundred forty-nine".