120691993 has 8 divisors (see below), whose sum is σ = 129958560. Its totient is φ = 111666240.

The previous prime is 120691981. The next prime is 120692051. The reversal of 120691993 is 399196021.

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 120691993 - 2⁹ = 120691481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120691973) 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, 59163 + ... + 61168.

It is an arithmetic number, because the mean of its divisors is an integer number (16244820).

Almost surely, 2^120691993 is an apocalyptic number.

It is an amenable number.

120691993 is a deficient number, since it is larger than the sum of its proper divisors (9266567).

120691993 is a wasteful number, since it uses less digits than its factorization.

120691993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120407.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 120691993 is about 10985.9907609646. The cubic root of 120691993 is about 494.1887101589.

The spelling of 120691993 in words is "one hundred twenty million, six hundred ninety-one thousand, nine hundred ninety-three".