89737729 has 3 divisors (see below), whose sum is σ = 89747203. Its totient is φ = 89728256.

The previous prime is 89737717. The next prime is 89737733. The reversal of 89737729 is 92773798.

It is a happy number.

The square root of 89737729 is 9473.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 87329025 + 2408704 = 9345^2 + 1552^2 .

It is not a de Polignac number, because 89737729 - 2¹⁵ = 89704961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89737129) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4737 + ... + 14209.

Almost surely, 2^89737729 is an apocalyptic number.

89737729 is the 9473-rd square number.

89737729 is the 4737-th centered octagonal number.

It is an amenable number.

89737729 is a deficient number, since it is larger than the sum of its proper divisors (9474).

89737729 is an frugal number, since it uses more digits than its factorization.

89737729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18946 (or 9473 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 52.

The cubic root of 89737729 is about 447.7047390804.

The spelling of 89737729 in words is "eighty-nine million, seven hundred thirty-seven thousand, seven hundred twenty-nine".