99997685 has 4 divisors (see below), whose sum is σ = 119997228. Its totient is φ = 79998144.

The previous prime is 99997679. The next prime is 99997687. The reversal of 99997685 is 58679999.

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 32741284 + 67256401 = 5722^2 + 8201^2 .

It is a cyclic number.

It is not a de Polignac number, because 99997685 - 2⁴ = 99997669 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 (99997687) 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, 9999764 + ... + 9999773.

It is an arithmetic number, because the mean of its divisors is an integer number (29999307).

Almost surely, 2^99997685 is an apocalyptic number.

It is an amenable number.

99997685 is a deficient number, since it is larger than the sum of its proper divisors (19999543).

99997685 is a wasteful number, since it uses less digits than its factorization.

99997685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19999542.

The product of its digits is 11022480, while the sum is 62.

The square root of 99997685 is about 9999.8842493301. The cubic root of 99997685 is about 464.1553015743.

The spelling of 99997685 in words is "ninety-nine million, nine hundred ninety-seven thousand, six hundred eighty-five".