89861851 has 4 divisors (see below), whose sum is σ = 93768912. Its totient is φ = 85954792.

The previous prime is 89861819. The next prime is 89861857. The reversal of 89861851 is 15816898.

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

It is a cyclic number.

It is not a de Polignac number, because 89861851 - 2⁵ = 89861819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89861857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1953496 + ... + 1953541.

It is an arithmetic number, because the mean of its divisors is an integer number (23442228).

Almost surely, 2^89861851 is an apocalyptic number.

89861851 is a deficient number, since it is larger than the sum of its proper divisors (3907061).

89861851 is a wasteful number, since it uses less digits than its factorization.

89861851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3907060.

The product of its digits is 138240, while the sum is 46.

The square root of 89861851 is about 9479.5490926520. The cubic root of 89861851 is about 447.9110603498.

The spelling of 89861851 in words is "eighty-nine million, eight hundred sixty-one thousand, eight hundred fifty-one".