67920329 has 4 divisors (see below), whose sum is σ = 68780160. Its totient is φ = 67060500.

The previous prime is 67920301. The next prime is 67920331. The reversal of 67920329 is 92302976.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67920329 is a prime.

It is a super-4 number, since 4×67920329⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67920292 and 67920301.

It is not an unprimeable number, because it can be changed into a prime (67922329) 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, 429797 + ... + 429954.

It is an arithmetic number, because the mean of its divisors is an integer number (17195040).

Almost surely, 2^67920329 is an apocalyptic number.

It is an amenable number.

67920329 is a deficient number, since it is larger than the sum of its proper divisors (859831).

67920329 is an equidigital number, since it uses as much as digits as its factorization.

67920329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859830.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 67920329 is about 8241.3790714904. The cubic root of 67920329 is about 408.0060412568.

The spelling of 67920329 in words is "sixty-seven million, nine hundred twenty thousand, three hundred twenty-nine".