68519930 has 16 divisors (see below), whose sum is σ = 126669960. Its totient is φ = 26667072.

The previous prime is 68519881. The next prime is 68519963. The reversal of 68519930 is 3991586.

It can be written as a sum of positive squares in 4 ways, for example, as 67584841 + 935089 = 8221^2 + 967^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92225 + ... + 92964.

Almost surely, 2^68519930 is an apocalyptic number.

68519930 is a deficient number, since it is larger than the sum of its proper divisors (58150030).

68519930 is a wasteful number, since it uses less digits than its factorization.

68519930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185233.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 68519930 is about 8277.6766063914. The cubic root of 68519930 is about 409.2031518871.

The spelling of 68519930 in words is "sixty-eight million, five hundred nineteen thousand, nine hundred thirty".