1897829141 has 16 divisors (see below), whose sum is σ = 2087875440. Its totient is φ = 1714252800.

The previous prime is 1897829137. The next prime is 1897829189. The reversal of 1897829141 is 1419287981.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 9579025 + 1888250116 = 3095^2 + 43454^2 .

It is not a de Polignac number, because 1897829141 - 2² = 1897829137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1897829141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897829111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272855 + ... + 279723.

It is an arithmetic number, because the mean of its divisors is an integer number (130492215).

Almost surely, 2^1897829141 is an apocalyptic number.

It is an amenable number.

1897829141 is a deficient number, since it is larger than the sum of its proper divisors (190046299).

1897829141 is a wasteful number, since it uses less digits than its factorization.

1897829141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7336.

The product of its digits is 290304, while the sum is 50.

The square root of 1897829141 is about 43564.0808579729. The cubic root of 1897829141 is about 1238.0904403590.

The spelling of 1897829141 in words is "one billion, eight hundred ninety-seven million, eight hundred twenty-nine thousand, one hundred forty-one".