68521299 has 32 divisors (see below), whose sum is σ = 116998656. Its totient is φ = 34629120.

The previous prime is 68521267. The next prime is 68521307. The reversal of 68521299 is 99212586.

It is not a de Polignac number, because 68521299 - 2⁵ = 68521267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68521299.

It is not an unprimeable number, because it can be changed into a prime (68521259) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4539 + ... + 12555.

It is an arithmetic number, because the mean of its divisors is an integer number (3656208).

Almost surely, 2^68521299 is an apocalyptic number.

68521299 is a deficient number, since it is larger than the sum of its proper divisors (48477357).

68521299 is a wasteful number, since it uses less digits than its factorization.

68521299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8075.

The product of its digits is 77760, while the sum is 42.

The square root of 68521299 is about 8277.7592982642. The cubic root of 68521299 is about 409.2058771058.

The spelling of 68521299 in words is "sixty-eight million, five hundred twenty-one thousand, two hundred ninety-nine".