1920189061 has 4 divisors (see below), whose sum is σ = 2194501792. Its totient is φ = 1645876332.

The previous prime is 1920189059. The next prime is 1920189071. The reversal of 1920189061 is 1609810291.

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 1920189061 - 2¹ = 1920189059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1920189061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920189031) 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, 137156355 + ... + 137156368.

It is an arithmetic number, because the mean of its divisors is an integer number (548625448).

Almost surely, 2^1920189061 is an apocalyptic number.

It is an amenable number.

1920189061 is a deficient number, since it is larger than the sum of its proper divisors (274312731).

1920189061 is an equidigital number, since it uses as much as digits as its factorization.

1920189061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274312730.

The product of its (nonzero) digits is 7776, while the sum is 37.

The square root of 1920189061 is about 43819.9619009419. The cubic root of 1920189061 is about 1242.9337966318.

The spelling of 1920189061 in words is "one billion, nine hundred twenty million, one hundred eighty-nine thousand, sixty-one".