2104281989 has 2 divisors, whose sum is σ = 2104281990. Its totient is φ = 2104281988.

The previous prime is 2104281973. The next prime is 2104282001. The reversal of 2104281989 is 9891824012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2009997889 + 94284100 = 44833^2 + 9710^2 .

It is a cyclic number.

It is not a de Polignac number, because 2104281989 - 2⁴ = 2104281973 is a prime.

It is a super-2 number, since 2×2104281989² = 8856005378459592242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2104281929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052140994 + 1052140995.

It is an arithmetic number, because the mean of its divisors is an integer number (1052140995).

Almost surely, 2^2104281989 is an apocalyptic number.

It is an amenable number.

2104281989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2104281989 is an equidigital number, since it uses as much as digits as its factorization.

2104281989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 2104281989 is about 45872.4534879049. The cubic root of 2104281989 is about 1281.4489591359.

The spelling of 2104281989 in words is "two billion, one hundred four million, two hundred eighty-one thousand, nine hundred eighty-nine".