89742647 has 4 divisors (see below), whose sum is σ = 89771496. Its totient is φ = 89713800.

The previous prime is 89742607. The next prime is 89742659. The reversal of 89742647 is 74624798.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89742647 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 (89742607) 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, 9104 + ... + 16197.

It is an arithmetic number, because the mean of its divisors is an integer number (22442874).

Almost surely, 2^89742647 is an apocalyptic number.

89742647 is a deficient number, since it is larger than the sum of its proper divisors (28849).

89742647 is a wasteful number, since it uses less digits than its factorization.

89742647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28848.

The product of its digits is 677376, while the sum is 47.

The square root of 89742647 is about 9473.2595763021. The cubic root of 89742647 is about 447.7129176236.

The spelling of 89742647 in words is "eighty-nine million, seven hundred forty-two thousand, six hundred forty-seven".