68993505 has 32 divisors (see below), whose sum is σ = 140179200. Its totient is φ = 31539456.

The previous prime is 68993473. The next prime is 68993513. The reversal of 68993505 is 50539986.

It is not a de Polignac number, because 68993505 - 2⁵ = 68993473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 35560 + ... + 37449.

It is an arithmetic number, because the mean of its divisors is an integer number (4380600).

Almost surely, 2^68993505 is an apocalyptic number.

It is an amenable number.

68993505 is an abundant number, since it is smaller than the sum of its proper divisors (71185695).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68993505 is a wasteful number, since it uses less digits than its factorization.

68993505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73030 (or 73024 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 68993505 is about 8306.2329006596. The cubic root of 68993505 is about 410.1437231603.

It can be divided in two parts, 6899 and 3505, that added together give a square (10404 = 102²).

The spelling of 68993505 in words is "sixty-eight million, nine hundred ninety-three thousand, five hundred five".