89471947 has 4 divisors (see below), whose sum is σ = 89498736. Its totient is φ = 89445160.

The previous prime is 89471929. The next prime is 89471951. The reversal of 89471947 is 74917498.

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 89471947 - 2¹¹ = 89469899 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 89471947.

It is not an unprimeable number, because it can be changed into a prime (89471747) 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, 7528 + ... + 15349.

It is an arithmetic number, because the mean of its divisors is an integer number (22374684).

Almost surely, 2^89471947 is an apocalyptic number.

89471947 is a deficient number, since it is larger than the sum of its proper divisors (26789).

89471947 is a wasteful number, since it uses less digits than its factorization.

89471947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26788.

The product of its digits is 508032, while the sum is 49.

The square root of 89471947 is about 9458.9612008930. The cubic root of 89471947 is about 447.2623033615.

The spelling of 89471947 in words is "eighty-nine million, four hundred seventy-one thousand, nine hundred forty-seven".