7859471397 has 4 divisors (see below), whose sum is σ = 10479295200. Its totient is φ = 5239647596.

The previous prime is 7859471311. The next prime is 7859471443. The reversal of 7859471397 is 7931749587.

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 7859471397 - 2⁸ = 7859471141 is a prime.

It is a super-2 number, since 2×7859471397² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7859471397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7859421397) 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, 1309911897 + ... + 1309911902.

It is an arithmetic number, because the mean of its divisors is an integer number (2619823800).

Almost surely, 2^7859471397 is an apocalyptic number.

It is an amenable number.

7859471397 is a deficient number, since it is larger than the sum of its proper divisors (2619823803).

7859471397 is a wasteful number, since it uses less digits than its factorization.

7859471397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2619823802.

The product of its digits is 13335840, while the sum is 60.

The square root of 7859471397 is about 88653.6598060114. The cubic root of 7859471397 is about 1988.2200355249.

The spelling of 7859471397 in words is "seven billion, eight hundred fifty-nine million, four hundred seventy-one thousand, three hundred ninety-seven".