67243971 has 4 divisors (see below), whose sum is σ = 89658632. Its totient is φ = 44829312.

The previous prime is 67243951. The next prime is 67243987. The reversal of 67243971 is 17934276.

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

It is not a de Polignac number, because 67243971 - 2⁹ = 67243459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67243901) 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, 11207326 + ... + 11207331.

It is an arithmetic number, because the mean of its divisors is an integer number (22414658).

Almost surely, 2^67243971 is an apocalyptic number.

67243971 is a deficient number, since it is larger than the sum of its proper divisors (22414661).

67243971 is a wasteful number, since it uses less digits than its factorization.

67243971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22414660.

The product of its digits is 63504, while the sum is 39.

The square root of 67243971 is about 8200.2421305715. The cubic root of 67243971 is about 406.6471979243.

It can be divided in two parts, 6 and 7243971, that multiplied together give a triangular number (43463826 = T₉₃₂₃).

The spelling of 67243971 in words is "sixty-seven million, two hundred forty-three thousand, nine hundred seventy-one".