67740919 has 2 divisors, whose sum is σ = 67740920. Its totient is φ = 67740918.

The previous prime is 67740899. The next prime is 67740929. The reversal of 67740919 is 91904776.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67740919 - 2¹³ = 67732727 is a prime.

It is a super-2 number, since 2×67740919² = 9177664213929122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67740929) 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, 33870459 + 33870460.

It is an arithmetic number, because the mean of its divisors is an integer number (33870460).

Almost surely, 2^67740919 is an apocalyptic number.

67740919 is a deficient number, since it is larger than the sum of its proper divisors (1).

67740919 is an equidigital number, since it uses as much as digits as its factorization.

67740919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 67740919 is about 8230.4871666263. The cubic root of 67740919 is about 407.6464782607.

The spelling of 67740919 in words is "sixty-seven million, seven hundred forty thousand, nine hundred nineteen".