1993869530 has 8 divisors (see below), whose sum is σ = 3588965172. Its totient is φ = 797547808.

The previous prime is 1993869511. The next prime is 1993869533. The reversal of 1993869530 is 359683991.

It can be written as a sum of positive squares in 2 ways, for example, as 1982653729 + 11215801 = 44527^2 + 3349^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1993869533) 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, 99693467 + ... + 99693486.

Almost surely, 2^1993869530 is an apocalyptic number.

1993869530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1993869530 is a deficient number, since it is larger than the sum of its proper divisors (1595095642).

1993869530 is a wasteful number, since it uses less digits than its factorization.

1993869530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199386960.

The product of its (nonzero) digits is 1574640, while the sum is 53.

The square root of 1993869530 is about 44652.7662077054. The cubic root of 1993869530 is about 1258.6324143065.

The spelling of 1993869530 in words is "one billion, nine hundred ninety-three million, eight hundred sixty-nine thousand, five hundred thirty".