67788349 has 2 divisors, whose sum is σ = 67788350. Its totient is φ = 67788348.

The previous prime is 67788251. The next prime is 67788373. The reversal of 67788349 is 94388776.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42968025 + 24820324 = 6555^2 + 4982^2 .

It is a cyclic number.

It is not a de Polignac number, because 67788349 - 2⁷ = 67788221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67788296 and 67788305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67788379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33894174 + 33894175.

It is an arithmetic number, because the mean of its divisors is an integer number (33894175).

Almost surely, 2^67788349 is an apocalyptic number.

It is an amenable number.

67788349 is a deficient number, since it is larger than the sum of its proper divisors (1).

67788349 is an equidigital number, since it uses as much as digits as its factorization.

67788349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 52.

The square root of 67788349 is about 8233.3680228689. The cubic root of 67788349 is about 407.7415963567.

The spelling of 67788349 in words is "sixty-seven million, seven hundred eighty-eight thousand, three hundred forty-nine".