1968505907 has 8 divisors (see below), whose sum is σ = 1986774720. Its totient is φ = 1950296040.

The previous prime is 1968505843. The next prime is 1968505919. The reversal of 1968505907 is 7095058691.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1968505907 - 2⁶ = 1968505843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1968505967) 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, 53828 + ... + 82670.

It is an arithmetic number, because the mean of its divisors is an integer number (248346840).

Almost surely, 2^1968505907 is an apocalyptic number.

1968505907 is a deficient number, since it is larger than the sum of its proper divisors (18268813).

1968505907 is a wasteful number, since it uses less digits than its factorization.

1968505907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29473.

The product of its (nonzero) digits is 680400, while the sum is 50.

The square root of 1968505907 is about 44367.8476714839. The cubic root of 1968505907 is about 1253.2726843122.

The spelling of 1968505907 in words is "one billion, nine hundred sixty-eight million, five hundred five thousand, nine hundred seven".