620239831 has 4 divisors (see below), whose sum is σ = 620523072. Its totient is φ = 619956592.

The previous prime is 620239811. The next prime is 620239853. The reversal of 620239831 is 138932026.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 620239831 - 2⁵ = 620239799 is a prime.

It is a super-2 number, since 2×620239831² = 769394895917817122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620239811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138310 + ... + 142723.

It is an arithmetic number, because the mean of its divisors is an integer number (155130768).

Almost surely, 2^620239831 is an apocalyptic number.

620239831 is a deficient number, since it is larger than the sum of its proper divisors (283241).

620239831 is a wasteful number, since it uses less digits than its factorization.

620239831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283240.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 620239831 is about 24904.6146527104. The cubic root of 620239831 is about 852.8118327290.

The spelling of 620239831 in words is "six hundred twenty million, two hundred thirty-nine thousand, eight hundred thirty-one".