823706997 has 8 divisors (see below), whose sum is σ = 1113744960. Its totient is φ = 541403520.

The previous prime is 823706941. The next prime is 823706999. The reversal of 823706997 is 799607328.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 823706997 - 2⁷ = 823706869 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823706999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1933372 + ... + 1933797.

It is an arithmetic number, because the mean of its divisors is an integer number (139218120).

Almost surely, 2^823706997 is an apocalyptic number.

It is an amenable number.

823706997 is a deficient number, since it is larger than the sum of its proper divisors (290037963).

823706997 is a wasteful number, since it uses less digits than its factorization.

823706997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3867243.

The product of its (nonzero) digits is 1143072, while the sum is 51.

The square root of 823706997 is about 28700.2961134550. The cubic root of 823706997 is about 937.3984945390.

The spelling of 823706997 in words is "eight hundred twenty-three million, seven hundred six thousand, nine hundred ninety-seven".