1968968139 has 8 divisors (see below), whose sum is σ = 2633843520. Its totient is φ = 1308369096.

The previous prime is 1968968123. The next prime is 1968968159. The reversal of 1968968139 is 9318698691.

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

It is not a de Polignac number, because 1968968139 - 2⁴ = 1968968123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1968968159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1068009 + ... + 1069850.

It is an arithmetic number, because the mean of its divisors is an integer number (329230440).

Almost surely, 2^1968968139 is an apocalyptic number.

1968968139 is a deficient number, since it is larger than the sum of its proper divisors (664875381).

1968968139 is a wasteful number, since it uses less digits than its factorization.

1968968139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138169.

The product of its digits is 5038848, while the sum is 60.

The square root of 1968968139 is about 44373.0564532127. The cubic root of 1968968139 is about 1253.3707718008.

The spelling of 1968968139 in words is "one billion, nine hundred sixty-eight million, nine hundred sixty-eight thousand, one hundred thirty-nine".