67399479 has 48 divisors (see below), whose sum is σ = 121004800. Its totient is φ = 36220608.

The previous prime is 67399469. The next prime is 67399483. The reversal of 67399479 is 97499376.

It is not a de Polignac number, because 67399479 - 2⁷ = 67399351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67399439) 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 47 ways as a sum of consecutive naturals, for example, 491899 + ... + 492035.

Almost surely, 2^67399479 is an apocalyptic number.

67399479 is a deficient number, since it is larger than the sum of its proper divisors (53605321).

67399479 is a wasteful number, since it uses less digits than its factorization.

67399479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 166 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 54.

The square root of 67399479 is about 8209.7185700851. The cubic root of 67399479 is about 406.9604265403.

It can be divided in two parts, 6739947 and 9, that added together give a triangular number (6739956 = T₃₆₇₁).

The spelling of 67399479 in words is "sixty-seven million, three hundred ninety-nine thousand, four hundred seventy-nine".