1968656087 has 4 divisors (see below), whose sum is σ = 1968884976. Its totient is φ = 1968427200.

The previous prime is 1968656071. The next prime is 1968656099. The reversal of 1968656087 is 7806568691.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1968656087 - 2⁴ = 1968656071 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 (1968656017) 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, 101018 + ... + 118919.

It is an arithmetic number, because the mean of its divisors is an integer number (492221244).

Almost surely, 2^1968656087 is an apocalyptic number.

1968656087 is a deficient number, since it is larger than the sum of its proper divisors (228889).

1968656087 is an equidigital number, since it uses as much as digits as its factorization.

1968656087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228888.

The product of its (nonzero) digits is 4354560, while the sum is 56.

The square root of 1968656087 is about 44369.5400810060. The cubic root of 1968656087 is about 1253.3045547957.

The spelling of 1968656087 in words is "one billion, nine hundred sixty-eight million, six hundred fifty-six thousand, eighty-seven".