67399947 has 12 divisors (see below), whose sum is σ = 97531720. Its totient is φ = 44851968.

The previous prime is 67399939. The next prime is 67399961. The reversal of 67399947 is 74999376.

It is not a de Polignac number, because 67399947 - 2³ = 67399939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67399893 and 67399902.

It is not an unprimeable number, because it can be changed into a prime (67399147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1297 + ... + 11682.

Almost surely, 2^67399947 is an apocalyptic number.

67399947 is a deficient number, since it is larger than the sum of its proper divisors (30131773).

67399947 is a wasteful number, since it uses less digits than its factorization.

67399947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13562 (or 13559 counting only the distinct ones).

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

The square root of 67399947 is about 8209.7470728397. The cubic root of 67399947 is about 406.9613684716.

The spelling of 67399947 in words is "sixty-seven million, three hundred ninety-nine thousand, nine hundred forty-seven".