620431923 has 16 divisors (see below), whose sum is σ = 891058176. Its totient is φ = 382873920.

The previous prime is 620431919. The next prime is 620431927. The reversal of 620431923 is 329134026.

620431923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (620431919) and next prime (620431927).

It is not a de Polignac number, because 620431923 - 2² = 620431919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (620431927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142890 + ... + 147167.

It is an arithmetic number, because the mean of its divisors is an integer number (55691136).

Almost surely, 2^620431923 is an apocalyptic number.

620431923 is a deficient number, since it is larger than the sum of its proper divisors (270626253).

620431923 is a wasteful number, since it uses less digits than its factorization.

620431923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290114.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 620431923 is about 24908.4709085082. The cubic root of 620431923 is about 852.8998639568.

Adding to 620431923 its reverse (329134026), we get a palindrome (949565949).

The spelling of 620431923 in words is "six hundred twenty million, four hundred thirty-one thousand, nine hundred twenty-three".