620039997 has 12 divisors (see below), whose sum is σ = 948296700. Its totient is φ = 389044608.

The previous prime is 620039983. The next prime is 620040011. The reversal of 620039997 is 799930026.

It is an interprime number because it is at equal distance from previous prime (620039983) and next prime (620040011).

It can be written as a sum of positive squares in 2 ways, for example, as 396567396 + 223472601 = 19914^2 + 14949^2 .

It is not a de Polignac number, because 620039997 - 2⁸ = 620039741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620032997) 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 11 ways as a sum of consecutive naturals, for example, 2026122 + ... + 2026427.

It is an arithmetic number, because the mean of its divisors is an integer number (79024725).

Almost surely, 2^620039997 is an apocalyptic number.

It is an amenable number.

620039997 is a deficient number, since it is larger than the sum of its proper divisors (328256703).

620039997 is a wasteful number, since it uses less digits than its factorization.

620039997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4052572 (or 4052569 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 620039997 is about 24900.6023421121. The cubic root of 620039997 is about 852.7202342338.

The spelling of 620039997 in words is "six hundred twenty million, thirty-nine thousand, nine hundred ninety-seven".