620403673 has 2 divisors, whose sum is σ = 620403674. Its totient is φ = 620403672.

The previous prime is 620403601. The next prime is 620403683. The reversal of 620403673 is 376304026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 439447369 + 180956304 = 20963^2 + 13452^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620403673 is a prime.

It is not a weakly prime, because it can be changed into another prime (620403683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310201836 + 310201837.

It is an arithmetic number, because the mean of its divisors is an integer number (310201837).

Almost surely, 2^620403673 is an apocalyptic number.

It is an amenable number.

620403673 is a deficient number, since it is larger than the sum of its proper divisors (1).

620403673 is an equidigital number, since it uses as much as digits as its factorization.

620403673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 31.

The square root of 620403673 is about 24907.9038258943. The cubic root of 620403673 is about 852.8869187886.

Adding to 620403673 its reverse (376304026), we get a palindrome (996707699).

The spelling of 620403673 in words is "six hundred twenty million, four hundred three thousand, six hundred seventy-three".