89772061 has 4 divisors (see below), whose sum is σ = 89826300. Its totient is φ = 89717824.

The previous prime is 89772047. The next prime is 89772077. The reversal of 89772061 is 16027798.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8231161 + 81540900 = 2869^2 + 9030^2 .

It is a cyclic number.

It is not a de Polignac number, because 89772061 - 2⁵ = 89772029 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89772031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24556 + ... + 27973.

It is an arithmetic number, because the mean of its divisors is an integer number (22456575).

Almost surely, 2^89772061 is an apocalyptic number.

89772061 is the 5065-th centered heptagonal number.

It is an amenable number.

89772061 is a deficient number, since it is larger than the sum of its proper divisors (54239).

89772061 is a wasteful number, since it uses less digits than its factorization.

89772061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54238.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 89772061 is about 9474.8119242548. The cubic root of 89772061 is about 447.7618263260.

The spelling of 89772061 in words is "eighty-nine million, seven hundred seventy-two thousand, sixty-one".