67161247 has 2 divisors, whose sum is σ = 67161248. Its totient is φ = 67161246.

The previous prime is 67161233. The next prime is 67161251. The reversal of 67161247 is 74216176.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67161247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67161287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33580623 + 33580624.

It is an arithmetic number, because the mean of its divisors is an integer number (33580624).

Almost surely, 2^67161247 is an apocalyptic number.

67161247 is a deficient number, since it is larger than the sum of its proper divisors (1).

67161247 is an equidigital number, since it uses as much as digits as its factorization.

67161247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 34.

The square root of 67161247 is about 8195.1965809247. The cubic root of 67161247 is about 406.4803760951.

The spelling of 67161247 in words is "sixty-seven million, one hundred sixty-one thousand, two hundred forty-seven".