89728537 has 4 divisors (see below), whose sum is σ = 89752320. Its totient is φ = 89704756.

The previous prime is 89728519. The next prime is 89728547. The reversal of 89728537 is 73582798.

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 89728537 - 2⁷ = 89728409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89728547) 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, 4837 + ... + 14242.

It is an arithmetic number, because the mean of its divisors is an integer number (22438080).

Almost surely, 2^89728537 is an apocalyptic number.

It is an amenable number.

89728537 is a deficient number, since it is larger than the sum of its proper divisors (23783).

89728537 is a wasteful number, since it uses less digits than its factorization.

89728537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23782.

The product of its digits is 846720, while the sum is 49.

The square root of 89728537 is about 9472.5148192019. The cubic root of 89728537 is about 447.6894521528.

The spelling of 89728537 in words is "eighty-nine million, seven hundred twenty-eight thousand, five hundred thirty-seven".