620428990970903 has 2 divisors, whose sum is σ = 620428990970904. Its totient is φ = 620428990970902.

The previous prime is 620428990970809. The next prime is 620428990970969. The reversal of 620428990970903 is 309079099824026.

620428990970903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620428990970903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620428996970903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310214495485451 + 310214495485452.

It is an arithmetic number, because the mean of its divisors is an integer number (310214495485452).

Almost surely, 2^{620428990970903} is an apocalyptic number.

620428990970903 is a deficient number, since it is larger than the sum of its proper divisors (1).

620428990970903 is an equidigital number, since it uses as much as digits as its factorization.

620428990970903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105815808, while the sum is 68.

The spelling of 620428990970903 in words is "six hundred twenty trillion, four hundred twenty-eight billion, nine hundred ninety million, nine hundred seventy thousand, nine hundred three".