67438657 has 16 divisors (see below), whose sum is σ = 83401920. Its totient is φ = 53611200.

The previous prime is 67438633. The next prime is 67438673. The reversal of 67438657 is 75683476.

It is a cyclic number.

It is not a de Polignac number, because 67438657 - 2¹¹ = 67436609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67438607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9694 + ... + 15127.

It is an arithmetic number, because the mean of its divisors is an integer number (5212620).

Almost surely, 2^67438657 is an apocalyptic number.

It is an amenable number.

67438657 is a deficient number, since it is larger than the sum of its proper divisors (15963263).

67438657 is a wasteful number, since it uses less digits than its factorization.

67438657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24864.

The product of its digits is 846720, while the sum is 46.

The square root of 67438657 is about 8212.1042979251. The cubic root of 67438657 is about 407.0392639810.

It can be divided in two parts, 6743 and 8657, that added together give a triangular number (15400 = T₁₇₅).

The spelling of 67438657 in words is "sixty-seven million, four hundred thirty-eight thousand, six hundred fifty-seven".