4351649 has 2 divisors, whose sum is σ = 4351650. Its totient is φ = 4351648.

The previous prime is 4351637. The next prime is 4351651. The reversal of 4351649 is 9461534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4000000 + 351649 = 2000^2 + 593^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4351649 is a prime.

Together with 4351651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4351619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2175824 + 2175825.

It is an arithmetic number, because the mean of its divisors is an integer number (2175825).

Almost surely, 2^4351649 is an apocalyptic number.

It is an amenable number.

4351649 is a deficient number, since it is larger than the sum of its proper divisors (1).

4351649 is an equidigital number, since it uses as much as digits as its factorization.

4351649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 4351649 is about 2086.0606414963. The cubic root of 4351649 is about 163.2618146788.

It can be divided in two parts, 4 and 351649, that multiplied together give a square (1406596 = 1186²).

The spelling of 4351649 in words is "four million, three hundred fifty-one thousand, six hundred forty-nine".