800712505 has 4 divisors (see below), whose sum is σ = 960855012. Its totient is φ = 640570000.

The previous prime is 800712487. The next prime is 800712509. The reversal of 800712505 is 505217008.

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

It can be written as a sum of positive squares in 2 ways, for example, as 206669376 + 594043129 = 14376^2 + 24373^2 .

It is not a de Polignac number, because 800712505 - 2¹¹ = 800710457 is a prime.

It is a super-2 number, since 2×800712505² = 1282281031326750050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (800712509) 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, 80071246 + ... + 80071255.

It is an arithmetic number, because the mean of its divisors is an integer number (240213753).

Almost surely, 2^800712505 is an apocalyptic number.

It is an amenable number.

800712505 is a deficient number, since it is larger than the sum of its proper divisors (160142507).

800712505 is a wasteful number, since it uses less digits than its factorization.

800712505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160142506.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 800712505 is about 28296.8638721679. The cubic root of 800712505 is about 928.5932812158.

The spelling of 800712505 in words is "eight hundred million, seven hundred twelve thousand, five hundred five".