67768931 has 4 divisors (see below), whose sum is σ = 67814952. Its totient is φ = 67722912.

The previous prime is 67768907. The next prime is 67768933. The reversal of 67768931 is 13986776.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 67768931 - 2²⁶ = 660067 is a prime.

It is a super-2 number, since 2×67768931² = 9185256017765522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67768933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20726 + ... + 23771.

It is an arithmetic number, because the mean of its divisors is an integer number (16953738).

Almost surely, 2^67768931 is an apocalyptic number.

67768931 is a deficient number, since it is larger than the sum of its proper divisors (46021).

67768931 is a wasteful number, since it uses less digits than its factorization.

67768931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46020.

The product of its digits is 381024, while the sum is 47.

The square root of 67768931 is about 8232.1887126086. The cubic root of 67768931 is about 407.7026600570.

The spelling of 67768931 in words is "sixty-seven million, seven hundred sixty-eight thousand, nine hundred thirty-one".