2019404897 has 4 divisors (see below), whose sum is σ = 2032958100. Its totient is φ = 2005851696.

The previous prime is 2019404861. The next prime is 2019404921. The reversal of 2019404897 is 7984049102.

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 225120016 + 1794284881 = 15004^2 + 42359^2 .

It is a cyclic number.

It is not a de Polignac number, because 2019404897 - 2⁸ = 2019404641 is a prime.

It is a super-2 number, since 2×2019404897² = 8155992276055161218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2019409897) 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, 6776378 + ... + 6776675.

It is an arithmetic number, because the mean of its divisors is an integer number (508239525).

Almost surely, 2^2019404897 is an apocalyptic number.

It is an amenable number.

2019404897 is a deficient number, since it is larger than the sum of its proper divisors (13553203).

2019404897 is a wasteful number, since it uses less digits than its factorization.

2019404897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13553202.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 2019404897 is about 44937.7891868303. The cubic root of 2019404897 is about 1263.9827150820.

The spelling of 2019404897 in words is "two billion, nineteen million, four hundred four thousand, eight hundred ninety-seven".