89191987007 has 4 divisors (see below), whose sum is σ = 94438574496. Its totient is φ = 83945399520.

The previous prime is 89191986979. The next prime is 89191987009. The reversal of 89191987007 is 70078919198.

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 89191987007 - 2⁶ = 89191986943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89191987009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2623293719 + ... + 2623293752.

It is an arithmetic number, because the mean of its divisors is an integer number (23609643624).

Almost surely, 2^89191987007 is an apocalyptic number.

89191987007 is a deficient number, since it is larger than the sum of its proper divisors (5246587489).

89191987007 is a wasteful number, since it uses less digits than its factorization.

89191987007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5246587488.

The product of its (nonzero) digits is 2286144, while the sum is 59.

The spelling of 89191987007 in words is "eighty-nine billion, one hundred ninety-one million, nine hundred eighty-seven thousand, seven".