1993720069 has 16 divisors (see below), whose sum is σ = 2230272000. Its totient is φ = 1766565360.

The previous prime is 1993720051. The next prime is 1993720073. The reversal of 1993720069 is 9600273991.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1993720069 is a prime.

It is a super-2 number, since 2×1993720069² = 7949839427066729522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1993720049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231804 + ... + 240250.

It is an arithmetic number, because the mean of its divisors is an integer number (139392000).

Almost surely, 2^1993720069 is an apocalyptic number.

It is an amenable number.

1993720069 is a deficient number, since it is larger than the sum of its proper divisors (236551931).

1993720069 is a wasteful number, since it uses less digits than its factorization.

1993720069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9000.

The product of its (nonzero) digits is 183708, while the sum is 46.

The square root of 1993720069 is about 44651.0925846166. The cubic root of 1993720069 is about 1258.6009643785.

The spelling of 1993720069 in words is "one billion, nine hundred ninety-three million, seven hundred twenty thousand, sixty-nine".