875728397 has 4 divisors (see below), whose sum is σ = 877557120. Its totient is φ = 873899676.

The previous prime is 875728379. The next prime is 875728409. The reversal of 875728397 is 793827578.

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, and also an emirpimes, since its reverse is a distinct semiprime: 793827578 = 2 ⋅396913789.

It is a cyclic number.

It is not a de Polignac number, because 875728397 - 2⁸ = 875728141 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 (875728097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913643 + ... + 914600.

It is an arithmetic number, because the mean of its divisors is an integer number (219389280).

Almost surely, 2^875728397 is an apocalyptic number.

It is an amenable number.

875728397 is a deficient number, since it is larger than the sum of its proper divisors (1828723).

875728397 is a wasteful number, since it uses less digits than its factorization.

875728397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828722.

The product of its digits is 5927040, while the sum is 56.

The square root of 875728397 is about 29592.7085107126. The cubic root of 875728397 is about 956.7309222193.

The spelling of 875728397 in words is "eight hundred seventy-five million, seven hundred twenty-eight thousand, three hundred ninety-seven".