871978597 has 4 divisors (see below), whose sum is σ = 996546976. Its totient is φ = 747410220.

The previous prime is 871978579. The next prime is 871978651. The reversal of 871978597 is 795879178.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 871978597 - 2¹⁵ = 871945829 is a prime.

It is a super-3 number, since 3×871978597³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871978517) 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, 62284179 + ... + 62284192.

It is an arithmetic number, because the mean of its divisors is an integer number (249136744).

Almost surely, 2^871978597 is an apocalyptic number.

It is an amenable number.

871978597 is a deficient number, since it is larger than the sum of its proper divisors (124568379).

871978597 is a wasteful number, since it uses less digits than its factorization.

871978597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124568378.

The product of its digits is 8890560, while the sum is 61.

The square root of 871978597 is about 29529.2837197247. The cubic root of 871978597 is about 955.3634197017.

The spelling of 871978597 in words is "eight hundred seventy-one million, nine hundred seventy-eight thousand, five hundred ninety-seven".