628100971 has 4 divisors (see below), whose sum is σ = 630844000. Its totient is φ = 625357944.

The previous prime is 628100953. The next prime is 628100981. The reversal of 628100971 is 179001826.

It is a happy number.

628100971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 628100971 - 2⁵ = 628100939 is a prime.

It is a super-2 number, since 2×628100971² = 789021659542285682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628100981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1371171 + ... + 1371628.

It is an arithmetic number, because the mean of its divisors is an integer number (157711000).

Almost surely, 2^628100971 is an apocalyptic number.

628100971 is a deficient number, since it is larger than the sum of its proper divisors (2743029).

628100971 is a wasteful number, since it uses less digits than its factorization.

628100971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743028.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 628100971 is about 25061.9426820827. The cubic root of 628100971 is about 856.3996640655.

The spelling of 628100971 in words is "six hundred twenty-eight million, one hundred thousand, nine hundred seventy-one".