68421602 has 6 divisors (see below), whose sum is σ = 102649953. Its totient is φ = 34204952.

The previous prime is 68421559. The next prime is 68421607. The reversal of 68421602 is 20612486.

It can be written as a sum of positive squares in 2 ways, for example, as 66569281 + 1852321 = 8159^2 + 1361^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5849.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68421607) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 8774 + ... + 14622.

Almost surely, 2^68421602 is an apocalyptic number.

68421602 is a deficient number, since it is larger than the sum of its proper divisors (34228351).

68421602 is an frugal number, since it uses more digits than its factorization.

68421602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11700 (or 5851 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 68421602 is about 8271.7351263202. The cubic root of 68421602 is about 409.0073188911.

Multiplying 68421602 by its product of nonzero digits (4608), we get a square (315286742016 = 561504²).

The spelling of 68421602 in words is "sixty-eight million, four hundred twenty-one thousand, six hundred two".