120420993 has 32 divisors (see below), whose sum is σ = 210723840. Its totient is φ = 59261760.

The previous prime is 120420991. The next prime is 120421001. The reversal of 120420993 is 399024021.

It is not a de Polignac number, because 120420993 - 2¹ = 120420991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120420993.

It is not an unprimeable number, because it can be changed into a prime (120420991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9330 + ... + 18107.

It is an arithmetic number, because the mean of its divisors is an integer number (6585120).

Almost surely, 2^120420993 is an apocalyptic number.

It is an amenable number.

120420993 is a deficient number, since it is larger than the sum of its proper divisors (90302847).

120420993 is a wasteful number, since it uses less digits than its factorization.

120420993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27477.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 120420993 is about 10973.6499397420. The cubic root of 120420993 is about 493.8185516527.

The spelling of 120420993 in words is "one hundred twenty million, four hundred twenty thousand, nine hundred ninety-three".