67860139 has 2 divisors, whose sum is σ = 67860140. Its totient is φ = 67860138.

The previous prime is 67860137. The next prime is 67860173. The reversal of 67860139 is 93106876.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67860139 - 2¹ = 67860137 is a prime.

Together with 67860137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (67860137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33930069 + 33930070.

It is an arithmetic number, because the mean of its divisors is an integer number (33930070).

Almost surely, 2^67860139 is an apocalyptic number.

67860139 is a deficient number, since it is larger than the sum of its proper divisors (1).

67860139 is an equidigital number, since it uses as much as digits as its factorization.

67860139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 67860139 is about 8237.7265674457. The cubic root of 67860139 is about 407.8854826463.

The spelling of 67860139 in words is "sixty-seven million, eight hundred sixty thousand, one hundred thirty-nine".