67979121 has 12 divisors (see below), whose sum is σ = 105437232. Its totient is φ = 38845128.

The previous prime is 67979117. The next prime is 67979123. The reversal of 67979121 is 12197976.

It is a happy number.

It is not a de Polignac number, because 67979121 - 2² = 67979117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67979123) 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, 231075 + ... + 231368.

It is an arithmetic number, because the mean of its divisors is an integer number (8786436).

Almost surely, 2^67979121 is an apocalyptic number.

It is an amenable number.

67979121 is a deficient number, since it is larger than the sum of its proper divisors (37458111).

67979121 is a wasteful number, since it uses less digits than its factorization.

67979121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462460 (or 462453 counting only the distinct ones).

The product of its digits is 47628, while the sum is 42.

The square root of 67979121 is about 8244.9451787140. The cubic root of 67979121 is about 408.1237309758.

It can be divided in two parts, 679 and 79121, that added together give a triangular number (79800 = T₃₉₉).

The spelling of 67979121 in words is "sixty-seven million, nine hundred seventy-nine thousand, one hundred twenty-one".