800145671 has 4 divisors (see below), whose sum is σ = 861695352. Its totient is φ = 738595992.

The previous prime is 800145659. The next prime is 800145673. The reversal of 800145671 is 176541008.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-800145671 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 (800145673) 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, 30774821 + ... + 30774846.

It is an arithmetic number, because the mean of its divisors is an integer number (215423838).

Almost surely, 2^800145671 is an apocalyptic number.

800145671 is a deficient number, since it is larger than the sum of its proper divisors (61549681).

800145671 is a wasteful number, since it uses less digits than its factorization.

800145671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61549680.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 800145671 is about 28286.8462540454. The cubic root of 800145671 is about 928.3741087102.

Adding to 800145671 its reverse (176541008), we get a palindrome (976686679).

The spelling of 800145671 in words is "eight hundred million, one hundred forty-five thousand, six hundred seventy-one".