68520999 has 8 divisors (see below), whose sum is σ = 96735600. Its totient is φ = 42993536.

The previous prime is 68520953. The next prime is 68521001. The reversal of 68520999 is 99902586.

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

It is a cyclic number.

It is not a de Polignac number, because 68520999 - 2⁷ = 68520871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68520919) 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, 671724 + ... + 671825.

It is an arithmetic number, because the mean of its divisors is an integer number (12091950).

Almost surely, 2^68520999 is an apocalyptic number.

68520999 is a deficient number, since it is larger than the sum of its proper divisors (28214601).

68520999 is a wasteful number, since it uses less digits than its factorization.

68520999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343569.

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 68520999 is about 8277.7411773986. The cubic root of 68520999 is about 409.2052799098.

The spelling of 68520999 in words is "sixty-eight million, five hundred twenty thousand, nine hundred ninety-nine".