161140929 has 4 divisors (see below), whose sum is σ = 214854576. Its totient is φ = 107427284.

The previous prime is 161140891. The next prime is 161140933. The reversal of 161140929 is 929041161.

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 161140929 - 2⁷ = 161140801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161140929.

It is not an unprimeable number, because it can be changed into a prime (161140999) 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, 26856819 + ... + 26856824.

It is an arithmetic number, because the mean of its divisors is an integer number (53713644).

Almost surely, 2^161140929 is an apocalyptic number.

It is an amenable number.

161140929 is a deficient number, since it is larger than the sum of its proper divisors (53713647).

161140929 is an equidigital number, since it uses as much as digits as its factorization.

161140929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53713646.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 161140929 is about 12694.1297062855. The cubic root of 161140929 is about 544.1708672908.

The spelling of 161140929 in words is "one hundred sixty-one million, one hundred forty thousand, nine hundred twenty-nine".