67748431 has 2 divisors, whose sum is σ = 67748432. Its totient is φ = 67748430.

The previous prime is 67748419. The next prime is 67748449. The reversal of 67748431 is 13484776.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67748431 - 2⁵ = 67748399 is a prime.

It is a super-2 number, since 2×67748431² = 9179699805923522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67748231) 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, 33874215 + 33874216.

It is an arithmetic number, because the mean of its divisors is an integer number (33874216).

Almost surely, 2^67748431 is an apocalyptic number.

67748431 is a deficient number, since it is larger than the sum of its proper divisors (1).

67748431 is an equidigital number, since it uses as much as digits as its factorization.

67748431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 40.

The square root of 67748431 is about 8230.9435060630. The cubic root of 67748431 is about 407.6615460966.

The spelling of 67748431 in words is "sixty-seven million, seven hundred forty-eight thousand, four hundred thirty-one".