620347331 has 2 divisors, whose sum is σ = 620347332. Its totient is φ = 620347330.

The previous prime is 620347327. The next prime is 620347337. The reversal of 620347331 is 133743026.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620347331 - 2² = 620347327 is a prime.

It is a super-2 number, since 2×620347331² = 769661622157647122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 620347294 and 620347303.

It is not a weakly prime, because it can be changed into another prime (620347337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310173665 + 310173666.

It is an arithmetic number, because the mean of its divisors is an integer number (310173666).

Almost surely, 2^620347331 is an apocalyptic number.

620347331 is a deficient number, since it is larger than the sum of its proper divisors (1).

620347331 is an equidigital number, since it uses as much as digits as its factorization.

620347331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 29.

The square root of 620347331 is about 24906.7727937603. The cubic root of 620347331 is about 852.8610996800.

The spelling of 620347331 in words is "six hundred twenty million, three hundred forty-seven thousand, three hundred thirty-one".