67973989 has 4 divisors (see below), whose sum is σ = 68121900. Its totient is φ = 67826080.

The previous prime is 67973987. The next prime is 67974019. The reversal of 67973989 is 98937976.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6477025 + 61496964 = 2545^2 + 7842^2 .

It is a cyclic number.

It is not a de Polignac number, because 67973989 - 2¹ = 67973987 is a prime.

It is a super-3 number, since 3×67973989³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67973981) 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, 73264 + ... + 74185.

It is an arithmetic number, because the mean of its divisors is an integer number (17030475).

Almost surely, 2^67973989 is an apocalyptic number.

It is an amenable number.

67973989 is a deficient number, since it is larger than the sum of its proper divisors (147911).

67973989 is a wasteful number, since it uses less digits than its factorization.

67973989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147910.

The product of its digits is 5143824, while the sum is 58.

The square root of 67973989 is about 8244.6339518501. The cubic root of 67973989 is about 408.1134604512.

The spelling of 67973989 in words is "sixty-seven million, nine hundred seventy-three thousand, nine hundred eighty-nine".