89720069 has 4 divisors (see below), whose sum is σ = 89824896. Its totient is φ = 89615244.

The previous prime is 89720041. The next prime is 89720077. The reversal of 89720069 is 96002798.

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 89720069 - 2²⁰ = 88671493 is a prime.

It is a super-2 number, since 2×89720069² = 16099381562729522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89720009) 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, 51119 + ... + 52844.

It is an arithmetic number, because the mean of its divisors is an integer number (22456224).

Almost surely, 2^89720069 is an apocalyptic number.

It is an amenable number.

89720069 is a deficient number, since it is larger than the sum of its proper divisors (104827).

89720069 is a wasteful number, since it uses less digits than its factorization.

89720069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104826.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 89720069 is about 9472.0678312605. The cubic root of 89720069 is about 447.6753683631.

The spelling of 89720069 in words is "eighty-nine million, seven hundred twenty thousand, sixty-nine".