628670123 has 2 divisors, whose sum is σ = 628670124. Its totient is φ = 628670122.

The previous prime is 628670099. The next prime is 628670177. The reversal of 628670123 is 321076826.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628670123 is a prime.

It is a super-2 number, since 2×628670123² = 790452247105670258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (628670923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314335061 + 314335062.

It is an arithmetic number, because the mean of its divisors is an integer number (314335062).

Almost surely, 2^628670123 is an apocalyptic number.

628670123 is a deficient number, since it is larger than the sum of its proper divisors (1).

628670123 is an equidigital number, since it uses as much as digits as its factorization.

628670123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 628670123 is about 25073.2950168102. The cubic root of 628670123 is about 856.6582607205.

The spelling of 628670123 in words is "six hundred twenty-eight million, six hundred seventy thousand, one hundred twenty-three".