67493819 has 2 divisors, whose sum is σ = 67493820. Its totient is φ = 67493818.

The previous prime is 67493801. The next prime is 67493821. The reversal of 67493819 is 91839476.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67493819 is a prime.

It is a super-2 number, since 2×67493819² = 9110831206409522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 67493821, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67493219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33746909 + 33746910.

It is an arithmetic number, because the mean of its divisors is an integer number (33746910).

Almost surely, 2^67493819 is an apocalyptic number.

67493819 is a deficient number, since it is larger than the sum of its proper divisors (1).

67493819 is an equidigital number, since it uses as much as digits as its factorization.

67493819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 47.

The square root of 67493819 is about 8215.4621902849. The cubic root of 67493819 is about 407.1502140985.

The spelling of 67493819 in words is "sixty-seven million, four hundred ninety-three thousand, eight hundred nineteen".