722134129 has 4 divisors (see below), whose sum is σ = 722600676. Its totient is φ = 721667584.

The previous prime is 722134123. The next prime is 722134141. The reversal of 722134129 is 921431227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 921431227 = 97 ⋅9499291.

It can be written as a sum of positive squares in 2 ways, for example, as 332150625 + 389983504 = 18225^2 + 19748^2 .

It is a cyclic number.

It is not a de Polignac number, because 722134129 - 2⁵ = 722134097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 722134129.

It is not an unprimeable number, because it can be changed into a prime (722134123) 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, 230944 + ... + 234049.

It is an arithmetic number, because the mean of its divisors is an integer number (180650169).

Almost surely, 2^722134129 is an apocalyptic number.

It is an amenable number.

722134129 is a deficient number, since it is larger than the sum of its proper divisors (466547).

722134129 is a wasteful number, since it uses less digits than its factorization.

722134129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466546.

The product of its digits is 6048, while the sum is 31.

The square root of 722134129 is about 26872.5534514307. The cubic root of 722134129 is about 897.1656217201.

The spelling of 722134129 in words is "seven hundred twenty-two million, one hundred thirty-four thousand, one hundred twenty-nine".