67899999 has 8 divisors (see below), whose sum is σ = 90651520. Its totient is φ = 45207576.

The previous prime is 67899983. The next prime is 67900003. The reversal of 67899999 is 99999876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 67899999 - 2⁴ = 67899983 is a prime.

It is a super-2 number, since 2×67899999² = 9220819728400002, which contains 22 as substring.

It is a Duffinian number.

67899999 is a modest number, since divided by 9999 gives 6789 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67899929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12019 + ... + 16740.

It is an arithmetic number, because the mean of its divisors is an integer number (11331440).

Almost surely, 2^67899999 is an apocalyptic number.

67899999 is a deficient number, since it is larger than the sum of its proper divisors (22751521).

67899999 is a wasteful number, since it uses less digits than its factorization.

67899999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29549.

The product of its digits is 19840464, while the sum is 66.

The square root of 67899999 is about 8240.1455691025. The cubic root of 67899999 is about 407.9653288973.

The spelling of 67899999 in words is "sixty-seven million, eight hundred ninety-nine thousand, nine hundred ninety-nine".