712128889 has 2 divisors, whose sum is σ = 712128890. Its totient is φ = 712128888.

The previous prime is 712128887. The next prime is 712128953. The reversal of 712128889 is 988821217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 711128889 + 1000000 = 26667^2 + 1000^2 .

It is a cyclic number.

It is not a de Polignac number, because 712128889 - 2¹ = 712128887 is a prime.

Together with 712128887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (712128883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 356064444 + 356064445.

It is an arithmetic number, because the mean of its divisors is an integer number (356064445).

Almost surely, 2^712128889 is an apocalyptic number.

It is an amenable number.

712128889 is a deficient number, since it is larger than the sum of its proper divisors (1).

712128889 is an equidigital number, since it uses as much as digits as its factorization.

712128889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 46.

The square root of 712128889 is about 26685.7431787087. The cubic root of 712128889 is about 893.0028975636.

The spelling of 712128889 in words is "seven hundred twelve million, one hundred twenty-eight thousand, eight hundred eighty-nine".