798042991 has 2 divisors, whose sum is σ = 798042992. Its totient is φ = 798042990.

The previous prime is 798042989. The next prime is 798043009. The reversal of 798042991 is 199240897.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 798042991 - 2¹ = 798042989 is a prime.

Together with 798042989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (798045991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399021495 + 399021496.

It is an arithmetic number, because the mean of its divisors is an integer number (399021496).

Almost surely, 2^798042991 is an apocalyptic number.

798042991 is a deficient number, since it is larger than the sum of its proper divisors (1).

798042991 is an equidigital number, since it uses as much as digits as its factorization.

798042991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 798042991 is about 28249.6547058544. The cubic root of 798042991 is about 927.5601793740.

The spelling of 798042991 in words is "seven hundred ninety-eight million, forty-two thousand, nine hundred ninety-one".