620381993 has 12 divisors (see below), whose sum is σ = 787275792. Its totient is φ = 483414120.

The previous prime is 620381987. The next prime is 620382019. The reversal of 620381993 is 399183026.

620381993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 620381993 - 2⁶ = 620381929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 620381993.

It is not an unprimeable number, because it can be changed into a prime (620381933) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 574955 + ... + 576032.

It is an arithmetic number, because the mean of its divisors is an integer number (65606316).

Almost surely, 2^620381993 is an apocalyptic number.

It is an amenable number.

620381993 is a deficient number, since it is larger than the sum of its proper divisors (166893799).

620381993 is a wasteful number, since it uses less digits than its factorization.

620381993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151012 (or 1151005 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 620381993 is about 24907.4686188701. The cubic root of 620381993 is about 852.8769839647.

The spelling of 620381993 in words is "six hundred twenty million, three hundred eighty-one thousand, nine hundred ninety-three".