89145424787 has 4 divisors (see below), whose sum is σ = 89153611920. Its totient is φ = 89137237656.

The previous prime is 89145424741. The next prime is 89145424793. The reversal of 89145424787 is 78742454198.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78742454198 = 2 ⋅39371227099.

It is a cyclic number.

It is not a de Polignac number, because 89145424787 - 2¹² = 89145420691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89145424717) 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, 4077212 + ... + 4099017.

It is an arithmetic number, because the mean of its divisors is an integer number (22288402980).

Almost surely, 2^89145424787 is an apocalyptic number.

89145424787 is a deficient number, since it is larger than the sum of its proper divisors (8187133).

89145424787 is a wasteful number, since it uses less digits than its factorization.

89145424787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8187132.

The product of its digits is 18063360, while the sum is 59.

The spelling of 89145424787 in words is "eighty-nine billion, one hundred forty-five million, four hundred twenty-four thousand, seven hundred eighty-seven".