69728563 has 6 divisors (see below), whose sum is σ = 70528844. Its totient is φ = 68937264.

The previous prime is 69728539. The next prime is 69728569. The reversal of 69728563 is 36582796.

It is a de Polignac number, because none of the positive numbers 2^k-69728563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69728569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3520 + ... + 12322.

Almost surely, 2^69728563 is an apocalyptic number.

69728563 is a deficient number, since it is larger than the sum of its proper divisors (800281).

69728563 is an frugal number, since it uses more digits than its factorization.

69728563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8981 (or 8892 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The square root of 69728563 is about 8350.3630459999. The cubic root of 69728563 is about 411.5951402737.

The spelling of 69728563 in words is "sixty-nine million, seven hundred twenty-eight thousand, five hundred sixty-three".