1929222145 has 4 divisors (see below), whose sum is σ = 2315066580. Its totient is φ = 1543377712.

The previous prime is 1929222131. The next prime is 1929222151. The reversal of 1929222145 is 5412229291.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 861305104 + 1067917041 = 29348^2 + 32679^2 .

It is a cyclic number.

It is not a de Polignac number, because 1929222145 - 2¹³ = 1929213953 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192922210 + ... + 192922219.

It is an arithmetic number, because the mean of its divisors is an integer number (578766645).

Almost surely, 2^1929222145 is an apocalyptic number.

It is an amenable number.

1929222145 is a deficient number, since it is larger than the sum of its proper divisors (385844435).

1929222145 is an equidigital number, since it uses as much as digits as its factorization.

1929222145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385844434.

The product of its digits is 25920, while the sum is 37.

The square root of 1929222145 is about 43922.9113902983. The cubic root of 1929222145 is about 1244.8797795777.

The spelling of 1929222145 in words is "one billion, nine hundred twenty-nine million, two hundred twenty-two thousand, one hundred forty-five".