2169738481 has 2 divisors, whose sum is σ = 2169738482. Its totient is φ = 2169738480.

The previous prime is 2169738427. The next prime is 2169738499. The reversal of 2169738481 is 1848379612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1377597456 + 792141025 = 37116^2 + 28145^2 .

It is a cyclic number.

It is not a de Polignac number, because 2169738481 - 2⁷ = 2169738353 is a prime.

It is a super-2 number, since 2×2169738481² = 9415530151864374722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2169738581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084869240 + 1084869241.

It is an arithmetic number, because the mean of its divisors is an integer number (1084869241).

Almost surely, 2^2169738481 is an apocalyptic number.

It is an amenable number.

2169738481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2169738481 is an equidigital number, since it uses as much as digits as its factorization.

2169738481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 49.

The square root of 2169738481 is about 46580.4517045509. The cubic root of 2169738481 is about 1294.6005796503.

The spelling of 2169738481 in words is "two billion, one hundred sixty-nine million, seven hundred thirty-eight thousand, four hundred eighty-one".