69899999 has 4 divisors (see below), whose sum is σ = 75276936. Its totient is φ = 64523064.

The previous prime is 69899989. The next prime is 69900041. The reversal of 69899999 is 99999896.

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-69899999 is a prime.

It is a Duffinian number.

69899999 is a modest number, since divided by 9999 gives 6989 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69899959) 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, 2688449 + ... + 2688474.

It is an arithmetic number, because the mean of its divisors is an integer number (18819234).

Almost surely, 2^69899999 is an apocalyptic number.

69899999 is a deficient number, since it is larger than the sum of its proper divisors (5376937).

69899999 is a wasteful number, since it uses less digits than its factorization.

69899999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5376936.

The product of its digits is 25509168, while the sum is 68.

The square root of 69899999 is about 8360.6219266272. The cubic root of 69899999 is about 411.9321828081.

The spelling of 69899999 in words is "sixty-nine million, eight hundred ninety-nine thousand, nine hundred ninety-nine".