68987255 has 4 divisors (see below), whose sum is σ = 82784712. Its totient is φ = 55189800.

The previous prime is 68987239. The next prime is 68987311. The reversal of 68987255 is 55278986.

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

It is not a de Polignac number, because 68987255 - 2⁴ = 68987239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6898721 + ... + 6898730.

It is an arithmetic number, because the mean of its divisors is an integer number (20696178).

Almost surely, 2^68987255 is an apocalyptic number.

68987255 is a deficient number, since it is larger than the sum of its proper divisors (13797457).

68987255 is a wasteful number, since it uses less digits than its factorization.

68987255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13797456.

The product of its digits is 1209600, while the sum is 50.

The square root of 68987255 is about 8305.8566686405. The cubic root of 68987255 is about 410.1313380540.

The spelling of 68987255 in words is "sixty-eight million, nine hundred eighty-seven thousand, two hundred fifty-five".