1920402797 has 4 divisors (see below), whose sum is σ = 1920696000. Its totient is φ = 1920109596.

The previous prime is 1920402791. The next prime is 1920402839. The reversal of 1920402797 is 7972040291.

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 1920402797 - 2¹⁶ = 1920337261 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 (1920402791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136547 + ... + 149952.

It is an arithmetic number, because the mean of its divisors is an integer number (480174000).

Almost surely, 2^1920402797 is an apocalyptic number.

It is an amenable number.

1920402797 is a deficient number, since it is larger than the sum of its proper divisors (293203).

1920402797 is an equidigital number, since it uses as much as digits as its factorization.

1920402797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293202.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 1920402797 is about 43822.4006302713. The cubic root of 1920402797 is about 1242.9799118551.

The spelling of 1920402797 in words is "one billion, nine hundred twenty million, four hundred two thousand, seven hundred ninety-seven".