68142087 has 32 divisors (see below), whose sum is σ = 110073600. Its totient is φ = 41410656.

The previous prime is 68142073. The next prime is 68142089. The reversal of 68142087 is 78024186.

It is not a de Polignac number, because 68142087 - 2⁴ = 68142071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68142089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27964 + ... + 30302.

It is an arithmetic number, because the mean of its divisors is an integer number (3439800).

Almost surely, 2^68142087 is an apocalyptic number.

68142087 is a deficient number, since it is larger than the sum of its proper divisors (41931513).

68142087 is a wasteful number, since it uses less digits than its factorization.

68142087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444 (or 2438 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 68142087 is about 8254.8220453260. The cubic root of 68142087 is about 408.4496016911.

The spelling of 68142087 in words is "sixty-eight million, one hundred forty-two thousand, eighty-seven".