67320389 has 2 divisors, whose sum is σ = 67320390. Its totient is φ = 67320388.

The previous prime is 67320371. The next prime is 67320419. The reversal of 67320389 is 98302376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55383364 + 11937025 = 7442^2 + 3455^2 .

It is a cyclic number.

It is not a de Polignac number, because 67320389 - 2⁸ = 67320133 is a prime.

It is a super-2 number, since 2×67320389² = 9064069550222642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67320349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33660194 + 33660195.

It is an arithmetic number, because the mean of its divisors is an integer number (33660195).

Almost surely, 2^67320389 is an apocalyptic number.

It is an amenable number.

67320389 is a deficient number, since it is larger than the sum of its proper divisors (1).

67320389 is an equidigital number, since it uses as much as digits as its factorization.

67320389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 67320389 is about 8204.9003040866. The cubic root of 67320389 is about 406.8011815006.

The spelling of 67320389 in words is "sixty-seven million, three hundred twenty thousand, three hundred eighty-nine".