1993845413 has 8 divisors (see below), whose sum is σ = 2377753728. Its totient is φ = 1634705424.

The previous prime is 1993845407. The next prime is 1993845431. The reversal of 1993845413 is 3145483991.

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 1993845413 - 2⁴ = 1993845397 is a prime.

It is a super-2 number, since 2×1993845413² = 7950839061882281138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1993845443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6191906 + ... + 6192227.

It is an arithmetic number, because the mean of its divisors is an integer number (297219216).

Almost surely, 2^1993845413 is an apocalyptic number.

It is an amenable number.

1993845413 is a deficient number, since it is larger than the sum of its proper divisors (383908315).

1993845413 is a wasteful number, since it uses less digits than its factorization.

1993845413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12384163.

The product of its digits is 466560, while the sum is 47.

The square root of 1993845413 is about 44652.4961564300. The cubic root of 1993845413 is about 1258.6273396582.

The spelling of 1993845413 in words is "one billion, nine hundred ninety-three million, eight hundred forty-five thousand, four hundred thirteen".