1968131759 has 4 divisors (see below), whose sum is σ = 2147052840. Its totient is φ = 1789210680.

The previous prime is 1968131743. The next prime is 1968131771. The reversal of 1968131759 is 9571318691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9571318691 = 11 ⋅870119881.

It is a cyclic number.

It is not a de Polignac number, because 1968131759 - 2⁴ = 1968131743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1968131729) 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, 89460524 + ... + 89460545.

It is an arithmetic number, because the mean of its divisors is an integer number (536763210).

Almost surely, 2^1968131759 is an apocalyptic number.

1968131759 is a deficient number, since it is larger than the sum of its proper divisors (178921081).

1968131759 is a wasteful number, since it uses less digits than its factorization.

1968131759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178921080.

The product of its digits is 408240, while the sum is 50.

The square root of 1968131759 is about 44363.6310393998. The cubic root of 1968131759 is about 1253.1932773572.

The spelling of 1968131759 in words is "one billion, nine hundred sixty-eight million, one hundred thirty-one thousand, seven hundred fifty-nine".