68934652987 has 4 divisors (see below), whose sum is σ = 68935398336. Its totient is φ = 68933907640.

The previous prime is 68934652967. The next prime is 68934653003. The reversal of 68934652987 is 78925643986.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 68934652987 - 2⁷ = 68934652859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68934652957) 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, 210388 + ... + 426769.

It is an arithmetic number, because the mean of its divisors is an integer number (17233849584).

Almost surely, 2^68934652987 is an apocalyptic number.

68934652987 is a deficient number, since it is larger than the sum of its proper divisors (745349).

68934652987 is a wasteful number, since it uses less digits than its factorization.

68934652987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745348.

The product of its digits is 156764160, while the sum is 67.

Subtracting 68934652987 from its reverse (78925643986), we obtain a palindrome (9990990999).

The spelling of 68934652987 in words is "sixty-eight billion, nine hundred thirty-four million, six hundred fifty-two thousand, nine hundred eighty-seven".