649079 has 2 divisors, whose sum is σ = 649080. Its totient is φ = 649078.

The previous prime is 649073. The next prime is 649081. The reversal of 649079 is 970946.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649079 - 2⁴ = 649063 is a prime.

Together with 649081, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324539 + 324540.

It is an arithmetic number, because the mean of its divisors is an integer number (324540).

2⁶⁴⁹⁰⁷⁹ is an apocalyptic number.

649079 is a deficient number, since it is larger than the sum of its proper divisors (1).

649079 is an equidigital number, since it uses as much as digits as its factorization.

649079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 649079 is about 805.6543924041. The cubic root of 649079 is about 86.5829780560.

The spelling of 649079 in words is "six hundred forty-nine thousand, seventy-nine".