9212409985 has 4 divisors (see below), whose sum is σ = 11054891988. Its totient is φ = 7369927984.

The previous prime is 9212409959. The next prime is 9212410013. The reversal of 9212409985 is 5899042129.

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 1759886401 + 7452523584 = 41951^2 + 86328^2 .

It is a cyclic number.

It is not a de Polignac number, because 9212409985 - 2²⁷ = 9078192257 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, 921240994 + ... + 921241003.

It is an arithmetic number, because the mean of its divisors is an integer number (2763722997).

Almost surely, 2^9212409985 is an apocalyptic number.

It is an amenable number.

9212409985 is a deficient number, since it is larger than the sum of its proper divisors (1842482003).

9212409985 is a wasteful number, since it uses less digits than its factorization.

9212409985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842482002.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 9212409985 is about 95981.3001839421. The cubic root of 9212409985 is about 2096.3208432940.

It can be divided in two parts, 921240 and 9985, that added together give a square (931225 = 965²).

The spelling of 9212409985 in words is "nine billion, two hundred twelve million, four hundred nine thousand, nine hundred eighty-five".