67536839 has 2 divisors, whose sum is σ = 67536840. Its totient is φ = 67536838.

The previous prime is 67536779. The next prime is 67536841. The reversal of 67536839 is 93863576.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67536839 - 2²⁰ = 66488263 is a prime.

It is a super-2 number, since 2×67536839² = 9122449244223842, which contains 22 as substring.

Together with 67536841, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 67536793 and 67536802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67536439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33768419 + 33768420.

It is an arithmetic number, because the mean of its divisors is an integer number (33768420).

Almost surely, 2^67536839 is an apocalyptic number.

67536839 is a deficient number, since it is larger than the sum of its proper divisors (1).

67536839 is an equidigital number, since it uses as much as digits as its factorization.

67536839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 47.

The square root of 67536839 is about 8218.0800069116. The cubic root of 67536839 is about 407.2367004482.

The spelling of 67536839 in words is "sixty-seven million, five hundred thirty-six thousand, eight hundred thirty-nine".