2981649 has 8 divisors (see below), whose sum is σ = 4336992. Its totient is φ = 1807040.

The previous prime is 2981597. The next prime is 2981653. The reversal of 2981649 is 9461892.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2981649 - 2¹⁹ = 2457361 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2981669) 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 7 ways as a sum of consecutive naturals, for example, 45144 + ... + 45209.

It is an arithmetic number, because the mean of its divisors is an integer number (542124).

2^2981649 is an apocalyptic number.

It is an amenable number.

2981649 is a deficient number, since it is larger than the sum of its proper divisors (1355343).

2981649 is a wasteful number, since it uses less digits than its factorization.

2981649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90367.

The product of its digits is 31104, while the sum is 39.

The square root of 2981649 is about 1726.7452041341. The cubic root of 2981649 is about 143.9302806790.

The spelling of 2981649 in words is "two million, nine hundred eighty-one thousand, six hundred forty-nine".