620506031 has 2 divisors, whose sum is σ = 620506032. Its totient is φ = 620506030.

The previous prime is 620505989. The next prime is 620506037. The reversal of 620506031 is 130605026.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620506031 is a prime.

It is a super-2 number, since 2×620506031² = 770055469014745922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 620505988 and 620506006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620506037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310253015 + 310253016.

It is an arithmetic number, because the mean of its divisors is an integer number (310253016).

Almost surely, 2^620506031 is an apocalyptic number.

620506031 is a deficient number, since it is larger than the sum of its proper divisors (1).

620506031 is an equidigital number, since it uses as much as digits as its factorization.

620506031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 620506031 is about 24909.9584704592. The cubic root of 620506031 is about 852.9338210462.

The spelling of 620506031 in words is "six hundred twenty million, five hundred six thousand, thirty-one".