1920097 has 4 divisors (see below), whose sum is σ = 1951636. Its totient is φ = 1888560.

The previous prime is 1920089. The next prime is 1920101. The reversal of 1920097 is 7900291.

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 553536 + 1366561 = 744^2 + 1169^2 .

It is not a de Polignac number, because 1920097 - 2³ = 1920089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1920397) 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, 15678 + ... + 15799.

It is an arithmetic number, because the mean of its divisors is an integer number (487909).

2^1920097 is an apocalyptic number.

It is an amenable number.

1920097 is a deficient number, since it is larger than the sum of its proper divisors (31539).

1920097 is an equidigital number, since it uses as much as digits as its factorization.

1920097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31538.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 1920097 is about 1385.6756474731. The cubic root of 1920097 is about 124.2913932692.

The spelling of 1920097 in words is "one million, nine hundred twenty thousand, ninety-seven".