1968900634 has 4 divisors (see below), whose sum is σ = 2953350954. Its totient is φ = 984450316.

The previous prime is 1968900589. The next prime is 1968900649. The reversal of 1968900634 is 4360098691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4360098691 = 13 ⋅335392207.

It can be written as a sum of positive squares in only one way, i.e., 1406025009 + 562875625 = 37497^2 + 23725^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492225157 + ... + 492225160.

Almost surely, 2^1968900634 is an apocalyptic number.

1968900634 is a deficient number, since it is larger than the sum of its proper divisors (984450320).

1968900634 is an equidigital number, since it uses as much as digits as its factorization.

1968900634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984450319.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 1968900634 is about 44372.2957936594. The cubic root of 1968900634 is about 1253.3564479258.

The spelling of 1968900634 in words is "one billion, nine hundred sixty-eight million, nine hundred thousand, six hundred thirty-four".