67861471 has 2 divisors, whose sum is σ = 67861472. Its totient is φ = 67861470.

The previous prime is 67861393. The next prime is 67861481. The reversal of 67861471 is 17416876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67861471 - 2¹⁵ = 67828703 is a prime.

It is a super-3 number, since 3×67861471³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67861481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33930735 + 33930736.

It is an arithmetic number, because the mean of its divisors is an integer number (33930736).

Almost surely, 2^67861471 is an apocalyptic number.

67861471 is a deficient number, since it is larger than the sum of its proper divisors (1).

67861471 is an equidigital number, since it uses as much as digits as its factorization.

67861471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

The square root of 67861471 is about 8237.8074145976. The cubic root of 67861471 is about 407.8881513701. Note that the first 3 decimals are identical.

The spelling of 67861471 in words is "sixty-seven million, eight hundred sixty-one thousand, four hundred seventy-one".