938721093 has 8 divisors (see below), whose sum is σ = 1272842400. Its totient is φ = 615206928.

The previous prime is 938721067. The next prime is 938721101. The reversal of 938721093 is 390127839.

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

It is not a de Polignac number, because 938721093 - 2⁶ = 938721029 is a prime.

It is a super-2 number, since 2×938721093² = 1762394580886229298, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (938721293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2651578 + ... + 2651931.

It is an arithmetic number, because the mean of its divisors is an integer number (159105300).

Almost surely, 2^938721093 is an apocalyptic number.

It is an amenable number.

938721093 is a deficient number, since it is larger than the sum of its proper divisors (334121307).

938721093 is a wasteful number, since it uses less digits than its factorization.

938721093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5303571.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 938721093 is about 30638.5556611274. Note that the first 3 decimals coincide. The cubic root of 938721093 is about 979.1416519346.

The spelling of 938721093 in words is "nine hundred thirty-eight million, seven hundred twenty-one thousand, ninety-three".