89724405385 has 4 divisors (see below), whose sum is σ = 107669286468. Its totient is φ = 71779524304.

The previous prime is 89724405359. The next prime is 89724405409. The reversal of 89724405385 is 58350442798.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30271824144 + 59452581241 = 173988^2 + 243829^2 .

It is a cyclic number.

It is not a de Polignac number, because 89724405385 - 2¹⁹ = 89723881097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8972440534 + ... + 8972440543.

It is an arithmetic number, because the mean of its divisors is an integer number (26917321617).

Almost surely, 2^89724405385 is an apocalyptic number.

It is an amenable number.

89724405385 is a deficient number, since it is larger than the sum of its proper divisors (17944881083).

89724405385 is a wasteful number, since it uses less digits than its factorization.

89724405385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17944881082.

The product of its (nonzero) digits is 9676800, while the sum is 55.

The spelling of 89724405385 in words is "eighty-nine billion, seven hundred twenty-four million, four hundred five thousand, three hundred eighty-five".