67431861 has 12 divisors (see below), whose sum is σ = 111316192. Its totient is φ = 38532456.

The previous prime is 67431841. The next prime is 67431941. The reversal of 67431861 is 16813476.

It is not a de Polignac number, because 67431861 - 2¹³ = 67423669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67431821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 535111 + ... + 535236.

Almost surely, 2^67431861 is an apocalyptic number.

It is an amenable number.

67431861 is a deficient number, since it is larger than the sum of its proper divisors (43884331).

67431861 is a wasteful number, since it uses less digits than its factorization.

67431861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070360 (or 1070357 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 67431861 is about 8211.6905080501. The cubic root of 67431861 is about 407.0255906573.

The spelling of 67431861 in words is "sixty-seven million, four hundred thirty-one thousand, eight hundred sixty-one".