718528897 has 4 divisors (see below), whose sum is σ = 732086100. Its totient is φ = 704971696.

The previous prime is 718528879. The next prime is 718528907. The reversal of 718528897 is 798825817.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 798825817 = 131 ⋅6097907.

It can be written as a sum of positive squares in 2 ways, for example, as 663783696 + 54745201 = 25764^2 + 7399^2 .

It is a cyclic number.

It is not a de Polignac number, because 718528897 - 2²³ = 710140289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (718528297) 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, 6778522 + ... + 6778627.

It is an arithmetic number, because the mean of its divisors is an integer number (183021525).

Almost surely, 2^718528897 is an apocalyptic number.

It is an amenable number.

718528897 is a deficient number, since it is larger than the sum of its proper divisors (13557203).

718528897 is a wasteful number, since it uses less digits than its factorization.

718528897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13557202.

The product of its digits is 2257920, while the sum is 55.

The square root of 718528897 is about 26805.3893275214. The cubic root of 718528897 is about 895.6701064343.

The spelling of 718528897 in words is "seven hundred eighteen million, five hundred twenty-eight thousand, eight hundred ninety-seven".