612112129 has 2 divisors, whose sum is σ = 612112130. Its totient is φ = 612112128.

The previous prime is 612112121. The next prime is 612112139. The reversal of 612112129 is 921211216.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 455737104 + 156375025 = 21348^2 + 12505^2 .

It is a cyclic number.

It is not a de Polignac number, because 612112129 - 2³ = 612112121 is a prime.

It is not a weakly prime, because it can be changed into another prime (612112121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306056064 + 306056065.

It is an arithmetic number, because the mean of its divisors is an integer number (306056065).

Almost surely, 2^612112129 is an apocalyptic number.

It is an amenable number.

612112129 is a deficient number, since it is larger than the sum of its proper divisors (1).

612112129 is an equidigital number, since it uses as much as digits as its factorization.

612112129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 25.

The square root of 612112129 is about 24740.8999230020. The cubic root of 612112129 is about 849.0703233411.

The spelling of 612112129 in words is "six hundred twelve million, one hundred twelve thousand, one hundred twenty-nine".