67861287 has 16 divisors (see below), whose sum is σ = 108269280. Its totient is φ = 41760576.

The previous prime is 67861271. The next prime is 67861319. The reversal of 67861287 is 78216876.

It is not a de Polignac number, because 67861287 - 2⁴ = 67861271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67861207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96318 + ... + 97019.

It is an arithmetic number, because the mean of its divisors is an integer number (6766830).

Almost surely, 2^67861287 is an apocalyptic number.

67861287 is a deficient number, since it is larger than the sum of its proper divisors (40407993).

67861287 is a wasteful number, since it uses less digits than its factorization.

67861287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193359 (or 193353 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 67861287 is about 8237.7962465698. The cubic root of 67861287 is about 407.8877827196.

The spelling of 67861287 in words is "sixty-seven million, eight hundred sixty-one thousand, two hundred eighty-seven".