798256991 has 6 divisors (see below), whose sum is σ = 928584720. Its totient is φ = 684220236.

The previous prime is 798256969. The next prime is 798256993. The reversal of 798256991 is 199652897.

It is a de Polignac number, because none of the positive numbers 2^k-798256991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (798256993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8145431 + ... + 8145528.

It is an arithmetic number, because the mean of its divisors is an integer number (154764120).

Almost surely, 2^798256991 is an apocalyptic number.

798256991 is a deficient number, since it is larger than the sum of its proper divisors (130327729).

798256991 is a wasteful number, since it uses less digits than its factorization.

798256991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16290973 (or 16290966 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 56.

The square root of 798256991 is about 28253.4421088829. The cubic root of 798256991 is about 927.6430822336.

The spelling of 798256991 in words is "seven hundred ninety-eight million, two hundred fifty-six thousand, nine hundred ninety-one".