1920805929 has 27 divisors (see below), whose sum is σ = 3229023837. Its totient is φ = 1097077464.

The previous prime is 1920805927. The next prime is 1920805933. The reversal of 1920805929 is 9295080291.

The square root of 1920805929 is 43827.

It is a perfect power (a square), and thus also a powerful number.

1920805929 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1920805929 - 2¹ = 1920805927 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1920805927) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 919324 + ... + 921410.

Almost surely, 2^1920805929 is an apocalyptic number.

1920805929 is the 43827-th square number.

1920805929 is the 21914-th centered octagonal number.

It is an amenable number.

1920805929 is a deficient number, since it is larger than the sum of its proper divisors (1308217908).

1920805929 is an frugal number, since it uses more digits than its factorization.

1920805929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4194 (or 2097 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The cubic root of 1920805929 is about 1243.0668814429.

The spelling of 1920805929 in words is "one billion, nine hundred twenty million, eight hundred five thousand, nine hundred twenty-nine".