1920190801 has 4 divisors (see below), whose sum is σ = 1920455092. Its totient is φ = 1919926512.

The previous prime is 1920190709. The next prime is 1920190841. The reversal of 1920190801 is 1080910291.

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 891321025 + 1028869776 = 29855^2 + 32076^2 .

It is a cyclic number.

It is not a de Polignac number, because 1920190801 - 2²⁷ = 1785973073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1920190841) 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, 120930 + ... + 135883.

It is an arithmetic number, because the mean of its divisors is an integer number (480113773).

Almost surely, 2^1920190801 is an apocalyptic number.

It is an amenable number.

1920190801 is a deficient number, since it is larger than the sum of its proper divisors (264291).

1920190801 is an equidigital number, since it uses as much as digits as its factorization.

1920190801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264290.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 1920190801 is about 43819.9817549026. The cubic root of 1920190801 is about 1242.9341720643.

It can be divided in two parts, 1920 and 190801, that added together give a square (192721 = 439²).

The spelling of 1920190801 in words is "one billion, nine hundred twenty million, one hundred ninety thousand, eight hundred one".