67442357 has 2 divisors, whose sum is σ = 67442358. Its totient is φ = 67442356.

The previous prime is 67442351. The next prime is 67442377. The reversal of 67442357 is 75324476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59382436 + 8059921 = 7706^2 + 2839^2 .

It is a cyclic number.

It is not a de Polignac number, because 67442357 - 2⁶ = 67442293 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67442357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67442351) 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, 33721178 + 33721179.

It is an arithmetic number, because the mean of its divisors is an integer number (33721179).

Almost surely, 2^67442357 is an apocalyptic number.

It is an amenable number.

67442357 is a deficient number, since it is larger than the sum of its proper divisors (1).

67442357 is an equidigital number, since it uses as much as digits as its factorization.

67442357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 38.

The square root of 67442357 is about 8212.3295720520. The cubic root of 67442357 is about 407.0467078705.

The spelling of 67442357 in words is "sixty-seven million, four hundred forty-two thousand, three hundred fifty-seven".