67691930 has 8 divisors (see below), whose sum is σ = 121845492. Its totient is φ = 27076768.

The previous prime is 67691929. The next prime is 67691957. The reversal of 67691930 is 3919676.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 56715961 + 10975969 = 7531^2 + 3313^2 .

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

It is a super-3 number, since 3×67691930³ (a number of 24 digits) contains 333 as substring.

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 3 ways as a sum of consecutive naturals, for example, 3384587 + ... + 3384606.

Almost surely, 2^67691930 is an apocalyptic number.

67691930 is a deficient number, since it is larger than the sum of its proper divisors (54153562).

67691930 is a wasteful number, since it uses less digits than its factorization.

67691930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6769200.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 67691930 is about 8227.5105590938. The cubic root of 67691930 is about 407.5481870576.

The spelling of 67691930 in words is "sixty-seven million, six hundred ninety-one thousand, nine hundred thirty".