875278993 has 4 divisors (see below), whose sum is σ = 898935220. Its totient is φ = 851622768.

The previous prime is 875278981. The next prime is 875278997. The reversal of 875278993 is 399872578.

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 410143504 + 465135489 = 20252^2 + 21567^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-875278993 is a prime.

It is a super-2 number, since 2×875278993² = 1532226631174188098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (875278997) 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, 11828058 + ... + 11828131.

It is an arithmetic number, because the mean of its divisors is an integer number (224733805).

Almost surely, 2^875278993 is an apocalyptic number.

It is an amenable number.

875278993 is a deficient number, since it is larger than the sum of its proper divisors (23656227).

875278993 is a wasteful number, since it uses less digits than its factorization.

875278993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23656226.

The product of its digits is 7620480, while the sum is 58.

The square root of 875278993 is about 29585.1143820672. The cubic root of 875278993 is about 956.5672366618.

The spelling of 875278993 in words is "eight hundred seventy-five million, two hundred seventy-eight thousand, nine hundred ninety-three".