67783997 has 2 divisors, whose sum is σ = 67783998. Its totient is φ = 67783996.

The previous prime is 67783973. The next prime is 67783999. The reversal of 67783997 is 79938776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36132121 + 31651876 = 6011^2 + 5626^2 .

It is a cyclic number.

It is not a de Polignac number, because 67783997 - 2²⁶ = 675133 is a prime.

Together with 67783999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67783999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33891998 + 33891999.

It is an arithmetic number, because the mean of its divisors is an integer number (33891999).

Almost surely, 2^67783997 is an apocalyptic number.

It is an amenable number.

67783997 is a deficient number, since it is larger than the sum of its proper divisors (1).

67783997 is an equidigital number, since it uses as much as digits as its factorization.

67783997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4000752, while the sum is 56.

The square root of 67783997 is about 8233.1037282425. The cubic root of 67783997 is about 407.7328705239.

The spelling of 67783997 in words is "sixty-seven million, seven hundred eighty-three thousand, nine hundred ninety-seven".