67319997 has 4 divisors (see below), whose sum is σ = 89760000. Its totient is φ = 44879996.

The previous prime is 67319977. The next prime is 67320023. The reversal of 67319997 is 79991376.

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 not a de Polignac number, because 67319997 - 2⁸ = 67319741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67319947) 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, 11219997 + ... + 11220002.

It is an arithmetic number, because the mean of its divisors is an integer number (22440000).

Almost surely, 2^67319997 is an apocalyptic number.

It is an amenable number.

67319997 is a deficient number, since it is larger than the sum of its proper divisors (22440003).

67319997 is a wasteful number, since it uses less digits than its factorization.

67319997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22440002.

The product of its digits is 642978, while the sum is 51.

The square root of 67319997 is about 8204.8764158883. The cubic root of 67319997 is about 406.8003919114.

The spelling of 67319997 in words is "sixty-seven million, three hundred nineteen thousand, nine hundred ninety-seven".