89960021 has 4 divisors (see below), whose sum is σ = 91874112. Its totient is φ = 88045932.

The previous prime is 89960011. The next prime is 89960033. The reversal of 89960021 is 12006998.

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 89960021 - 2⁶ = 89959957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89960011) 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, 956975 + ... + 957068.

It is an arithmetic number, because the mean of its divisors is an integer number (22968528).

Almost surely, 2^89960021 is an apocalyptic number.

It is an amenable number.

89960021 is a deficient number, since it is larger than the sum of its proper divisors (1914091).

89960021 is a wasteful number, since it uses less digits than its factorization.

89960021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914090.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 89960021 is about 9484.7256681467. The cubic root of 89960021 is about 448.0741085018.

The spelling of 89960021 in words is "eighty-nine million, nine hundred sixty thousand, twenty-one".