67143445 has 8 divisors (see below), whose sum is σ = 82537560. Its totient is φ = 52404480.

The previous prime is 67143409. The next prime is 67143451. The reversal of 67143445 is 54434176.

It can be written as a sum of positive squares in 4 ways, for example, as 1306449 + 65836996 = 1143^2 + 8114^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 67143445 - 2⁷ = 67143317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67143445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163560 + ... + 163969.

It is an arithmetic number, because the mean of its divisors is an integer number (10317195).

Almost surely, 2^67143445 is an apocalyptic number.

It is an amenable number.

67143445 is a deficient number, since it is larger than the sum of its proper divisors (15394115).

67143445 is a wasteful number, since it uses less digits than its factorization.

67143445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327575.

The product of its digits is 40320, while the sum is 34.

The square root of 67143445 is about 8194.1103849045. The cubic root of 67143445 is about 406.4444585413. Note that the first 4 decimals are identical.

The spelling of 67143445 in words is "sixty-seven million, one hundred forty-three thousand, four hundred forty-five".