1920690973 has 4 divisors (see below), whose sum is σ = 1920786048. Its totient is φ = 1920595900.

The previous prime is 1920690971. The next prime is 1920690983. The reversal of 1920690973 is 3790960291.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1920690973 - 2¹ = 1920690971 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920690971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3853 + ... + 62098.

It is an arithmetic number, because the mean of its divisors is an integer number (480196512).

Almost surely, 2^1920690973 is an apocalyptic number.

It is an amenable number.

1920690973 is a deficient number, since it is larger than the sum of its proper divisors (95075).

1920690973 is an equidigital number, since it uses as much as digits as its factorization.

1920690973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95074.

The product of its (nonzero) digits is 183708, while the sum is 46.

The square root of 1920690973 is about 43825.6885057155. The cubic root of 1920690973 is about 1243.0420826774.

The spelling of 1920690973 in words is "one billion, nine hundred twenty million, six hundred ninety thousand, nine hundred seventy-three".