67939147 has 2 divisors, whose sum is σ = 67939148. Its totient is φ = 67939146.

The previous prime is 67939133. The next prime is 67939153. The reversal of 67939147 is 74193976.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67939147 - 2⁷ = 67939019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67939097 and 67939106.

It is not a weakly prime, because it can be changed into another prime (67939127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33969573 + 33969574.

It is an arithmetic number, because the mean of its divisors is an integer number (33969574).

Almost surely, 2^67939147 is an apocalyptic number.

67939147 is a deficient number, since it is larger than the sum of its proper divisors (1).

67939147 is an equidigital number, since it uses as much as digits as its factorization.

67939147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 46.

The square root of 67939147 is about 8242.5206702804. The cubic root of 67939147 is about 408.0437184826.

It can be divided in two parts, 67939 and 147, that added together give a palindrome (68086).

The spelling of 67939147 in words is "sixty-seven million, nine hundred thirty-nine thousand, one hundred forty-seven".