68698690 has 8 divisors (see below), whose sum is σ = 123657660. Its totient is φ = 27479472.

The previous prime is 68698673. The next prime is 68698691. The reversal of 68698690 is 9689686.

It can be written as a sum of positive squares in 2 ways, for example, as 68608089 + 90601 = 8283^2 + 301^2 .

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

It is a super-2 number, since 2×68698690² = 9439020015432200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68698691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3434925 + ... + 3434944.

Almost surely, 2^68698690 is an apocalyptic number.

68698690 is a deficient number, since it is larger than the sum of its proper divisors (54958970).

68698690 is a wasteful number, since it uses less digits than its factorization.

68698690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6869876.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The square root of 68698690 is about 8288.4672889504. The cubic root of 68698690 is about 409.5586963013.

The spelling of 68698690 in words is "sixty-eight million, six hundred ninety-eight thousand, six hundred ninety".