1896539881 has 2 divisors, whose sum is σ = 1896539882. Its totient is φ = 1896539880.

The previous prime is 1896539867. The next prime is 1896539921. The reversal of 1896539881 is 1889356981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1468422400 + 428117481 = 38320^2 + 20691^2 .

It is an emirp because it is prime and its reverse (1889356981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1896539881 - 2⁷ = 1896539753 is a prime.

It is a super-2 number, since 2×1896539881² = 7193727040446988322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1896539831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 948269940 + 948269941.

It is an arithmetic number, because the mean of its divisors is an integer number (948269941).

Almost surely, 2^1896539881 is an apocalyptic number.

It is an amenable number.

1896539881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1896539881 is an equidigital number, since it uses as much as digits as its factorization.

1896539881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 58.

The square root of 1896539881 is about 43549.2810618040. The cubic root of 1896539881 is about 1237.8100178421.

The spelling of 1896539881 in words is "one billion, eight hundred ninety-six million, five hundred thirty-nine thousand, eight hundred eighty-one".