793789921 has 4 divisors (see below), whose sum is σ = 794042644. Its totient is φ = 793537200.

The previous prime is 793789903. The next prime is 793789939. The reversal of 793789921 is 129987397.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 129987397 = 199 ⋅653203.

It is an interprime number because it is at equal distance from previous prime (793789903) and next prime (793789939).

It can be written as a sum of positive squares in 2 ways, for example, as 154256400 + 639533521 = 12420^2 + 25289^2 .

It is a cyclic number.

It is not a de Polignac number, because 793789921 - 2⁷ = 793789793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (793789981) 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, 121590 + ... + 127951.

It is an arithmetic number, because the mean of its divisors is an integer number (198510661).

Almost surely, 2^793789921 is an apocalyptic number.

It is an amenable number.

793789921 is a deficient number, since it is larger than the sum of its proper divisors (252723).

793789921 is a wasteful number, since it uses less digits than its factorization.

793789921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252722.

The product of its digits is 1714608, while the sum is 55.

The square root of 793789921 is about 28174.2776482379. The cubic root of 793789921 is about 925.9094716097.

The spelling of 793789921 in words is "seven hundred ninety-three million, seven hundred eighty-nine thousand, nine hundred twenty-one".