798856891 has 4 divisors (see below), whose sum is σ = 912979312. Its totient is φ = 684734472.

The previous prime is 798856871. The next prime is 798856901. The reversal of 798856891 is 198658897.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 798856891 - 2⁵ = 798856859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (798856871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57061200 + ... + 57061213.

It is an arithmetic number, because the mean of its divisors is an integer number (228244828).

Almost surely, 2^798856891 is an apocalyptic number.

798856891 is a deficient number, since it is larger than the sum of its proper divisors (114122421).

798856891 is a wasteful number, since it uses less digits than its factorization.

798856891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114122420.

The product of its digits is 8709120, while the sum is 61.

The square root of 798856891 is about 28264.0565206058. The cubic root of 798856891 is about 927.8754024620.

The spelling of 798856891 in words is "seven hundred ninety-eight million, eight hundred fifty-six thousand, eight hundred ninety-one".