628680903973 has 2 divisors, whose sum is σ = 628680903974. Its totient is φ = 628680903972.

The previous prime is 628680903901. The next prime is 628680904031. The reversal of 628680903973 is 379309086826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 520428059649 + 108252844324 = 721407^2 + 329018^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628680903973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628680909973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314340451986 + 314340451987.

It is an arithmetic number, because the mean of its divisors is an integer number (314340451987).

Almost surely, 2^628680903973 is an apocalyptic number.

It is an amenable number.

628680903973 is a deficient number, since it is larger than the sum of its proper divisors (1).

628680903973 is an equidigital number, since it uses as much as digits as its factorization.

628680903973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23514624, while the sum is 61.

The spelling of 628680903973 in words is "six hundred twenty-eight billion, six hundred eighty million, nine hundred three thousand, nine hundred seventy-three".