109751993 has 8 divisors (see below), whose sum is σ = 120132936. Its totient is φ = 99648000.

The previous prime is 109751989. The next prime is 109752001. The reversal of 109751993 is 399157901.

It can be written as a sum of positive squares in 4 ways, for example, as 1841449 + 107910544 = 1357^2 + 10388^2 .

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 109751993 - 2² = 109751989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109754993) 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, 68408 + ... + 69993.

It is an arithmetic number, because the mean of its divisors is an integer number (15016617).

Almost surely, 2^109751993 is an apocalyptic number.

109751993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

109751993 is a deficient number, since it is larger than the sum of its proper divisors (10380943).

109751993 is a wasteful number, since it uses less digits than its factorization.

109751993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138475.

The product of its (nonzero) digits is 76545, while the sum is 44.

The square root of 109751993 is about 10476.2585401469. The cubic root of 109751993 is about 478.7816221185.

The spelling of 109751993 in words is "one hundred nine million, seven hundred fifty-one thousand, nine hundred ninety-three".