67992971 has 4 divisors (see below), whose sum is σ = 68373000. Its totient is φ = 67612944.

The previous prime is 67992961. The next prime is 67993049. The reversal of 67992971 is 17929976.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 67992971 - 2¹⁰ = 67991947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67992901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189746 + ... + 190103.

It is an arithmetic number, because the mean of its divisors is an integer number (17093250).

Almost surely, 2^67992971 is an apocalyptic number.

67992971 is a deficient number, since it is larger than the sum of its proper divisors (380029).

67992971 is a wasteful number, since it uses less digits than its factorization.

67992971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380028.

The product of its digits is 428652, while the sum is 50.

The square root of 67992971 is about 8245.7850444939. The cubic root of 67992971 is about 408.1514460043.

The spelling of 67992971 in words is "sixty-seven million, nine hundred ninety-two thousand, nine hundred seventy-one".