3147649 has 2 divisors, whose sum is σ = 3147650. Its totient is φ = 3147648.

The previous prime is 3147629. The next prime is 3147653. The reversal of 3147649 is 9467413.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2496400 + 651249 = 1580^2 + 807^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3147649 is a prime.

It is not a weakly prime, because it can be changed into another prime (3147629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1573824 + 1573825.

It is an arithmetic number, because the mean of its divisors is an integer number (1573825).

Almost surely, 2^3147649 is an apocalyptic number.

It is an amenable number.

3147649 is a deficient number, since it is larger than the sum of its proper divisors (1).

3147649 is an equidigital number, since it uses as much as digits as its factorization.

3147649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

The square root of 3147649 is about 1774.1614920858. The cubic root of 3147649 is about 146.5532427706.

The spelling of 3147649 in words is "three million, one hundred forty-seven thousand, six hundred forty-nine".