67939897 has 2 divisors, whose sum is σ = 67939898. Its totient is φ = 67939896.

The previous prime is 67939891. The next prime is 67939901. The reversal of 67939897 is 79893976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44475561 + 23464336 = 6669^2 + 4844^2 .

It is a cyclic number.

It is not a de Polignac number, because 67939897 - 2³ = 67939889 is a prime.

It is not a weakly prime, because it can be changed into another prime (67939891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33969948 + 33969949.

It is an arithmetic number, because the mean of its divisors is an integer number (33969949).

Almost surely, 2^67939897 is an apocalyptic number.

It is an amenable number.

67939897 is a deficient number, since it is larger than the sum of its proper divisors (1).

67939897 is an equidigital number, since it uses as much as digits as its factorization.

67939897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5143824, while the sum is 58.

The square root of 67939897 is about 8242.5661659461. The cubic root of 67939897 is about 408.0452199815.

The spelling of 67939897 in words is "sixty-seven million, nine hundred thirty-nine thousand, eight hundred ninety-seven".