801165391 has 4 divisors (see below), whose sum is σ = 862793512. Its totient is φ = 739537272.

The previous prime is 801165383. The next prime is 801165413. The reversal of 801165391 is 193561108.

801165391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 801165391 - 2³ = 801165383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801165361) 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, 30814041 + ... + 30814066.

It is an arithmetic number, because the mean of its divisors is an integer number (215698378).

Almost surely, 2^801165391 is an apocalyptic number.

801165391 is a deficient number, since it is larger than the sum of its proper divisors (61628121).

801165391 is a wasteful number, since it uses less digits than its factorization.

801165391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61628120.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 801165391 is about 28304.8651471792. The cubic root of 801165391 is about 928.7683201681.

The spelling of 801165391 in words is "eight hundred one million, one hundred sixty-five thousand, three hundred ninety-one".