19931293 has 4 divisors (see below), whose sum is σ = 21103740. Its totient is φ = 18758848.

The previous prime is 19931291. The next prime is 19931299. The reversal of 19931293 is 39213991.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8922169 + 11009124 = 2987^2 + 3318^2 .

It is a cyclic number.

It is not a de Polignac number, because 19931293 - 2¹ = 19931291 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 (19931291) 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, 586198 + ... + 586231.

It is an arithmetic number, because the mean of its divisors is an integer number (5275935).

Almost surely, 2^19931293 is an apocalyptic number.

It is an amenable number.

19931293 is a deficient number, since it is larger than the sum of its proper divisors (1172447).

19931293 is a wasteful number, since it uses less digits than its factorization.

19931293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172446.

The product of its digits is 13122, while the sum is 37.

The square root of 19931293 is about 4464.4476702051. The cubic root of 19931293 is about 271.1305725538.

The spelling of 19931293 in words is "nineteen million, nine hundred thirty-one thousand, two hundred ninety-three".