649151 has 2 divisors, whose sum is σ = 649152. Its totient is φ = 649150.

The previous prime is 649147. The next prime is 649157. The reversal of 649151 is 151946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649151 - 2² = 649147 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 649151.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324575 + 324576.

It is an arithmetic number, because the mean of its divisors is an integer number (324576).

2⁶⁴⁹¹⁵¹ is an apocalyptic number.

649151 is a deficient number, since it is larger than the sum of its proper divisors (1).

649151 is an equidigital number, since it uses as much as digits as its factorization.

649151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 649151 is about 805.6990753377. The cubic root of 649151 is about 86.5861793838.

The spelling of 649151 in words is "six hundred forty-nine thousand, one hundred fifty-one".