1612868129 has 4 divisors (see below), whose sum is σ = 1613104176. Its totient is φ = 1612632084.

The previous prime is 1612868119. The next prime is 1612868137. The reversal of 1612868129 is 9218682161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1612868129 - 2⁴ = 1612868113 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 1612868129.

It is not an unprimeable number, because it can be changed into a prime (1612868119) 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, 107459 + ... + 121544.

It is an arithmetic number, because the mean of its divisors is an integer number (403276044).

Almost surely, 2^1612868129 is an apocalyptic number.

It is an amenable number.

1612868129 is a deficient number, since it is larger than the sum of its proper divisors (236047).

1612868129 is an equidigital number, since it uses as much as digits as its factorization.

1612868129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236046.

The product of its digits is 82944, while the sum is 44.

The square root of 1612868129 is about 40160.5294910314. The cubic root of 1612868129 is about 1172.7342797852.

The spelling of 1612868129 in words is "one billion, six hundred twelve million, eight hundred sixty-eight thousand, one hundred twenty-nine".