801736991 has 8 divisors (see below), whose sum is σ = 875242368. Its totient is φ = 728335000.

The previous prime is 801736961. The next prime is 801736993. The reversal of 801736991 is 199637108.

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

It is a cyclic number.

It is not a de Polignac number, because 801736991 - 2¹⁴ = 801720607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801736993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9155 + ... + 41076.

It is an arithmetic number, because the mean of its divisors is an integer number (109405296).

Almost surely, 2^801736991 is an apocalyptic number.

801736991 is a deficient number, since it is larger than the sum of its proper divisors (73505377).

801736991 is a wasteful number, since it uses less digits than its factorization.

801736991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51693.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 801736991 is about 28314.9605509172. The cubic root of 801736991 is about 928.9891475499.

The spelling of 801736991 in words is "eight hundred one million, seven hundred thirty-six thousand, nine hundred ninety-one".