798649 has 2 divisors, whose sum is σ = 798650. Its totient is φ = 798648.

The previous prime is 798647. The next prime is 798667. The reversal of 798649 is 946897.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 739600 + 59049 = 860^2 + 243^2 .

It is a cyclic number.

It is not a de Polignac number, because 798649 - 2¹ = 798647 is a prime.

Together with 798647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (798641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399324 + 399325.

It is an arithmetic number, because the mean of its divisors is an integer number (399325).

2⁷⁹⁸⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

798649 is a deficient number, since it is larger than the sum of its proper divisors (1).

798649 is an equidigital number, since it uses as much as digits as its factorization.

798649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 798649 is about 893.6716399215. The cubic root of 798649 is about 92.7794906743.

The spelling of 798649 in words is "seven hundred ninety-eight thousand, six hundred forty-nine".