2168431929 has 12 divisors (see below), whose sum is σ = 3132722736. Its totient is φ = 1445370552.

The previous prime is 2168431913. The next prime is 2168431949. The reversal of 2168431929 is 9291348612.

2168431929 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2168431929 - 2⁴ = 2168431913 is a prime.

It is a super-2 number, since 2×2168431929² = 9404194061413322082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2168431949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44722 + ... + 79604.

It is an arithmetic number, because the mean of its divisors is an integer number (261060228).

Almost surely, 2^2168431929 is an apocalyptic number.

It is an amenable number.

2168431929 is a deficient number, since it is larger than the sum of its proper divisors (964290807).

2168431929 is a wasteful number, since it uses less digits than its factorization.

2168431929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41796 (or 41793 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 2168431929 is about 46566.4249110880. The cubic root of 2168431929 is about 1294.3406708147.

The spelling of 2168431929 in words is "two billion, one hundred sixty-eight million, four hundred thirty-one thousand, nine hundred twenty-nine".