2681692381 has 2 divisors, whose sum is σ = 2681692382. Its totient is φ = 2681692380.

The previous prime is 2681692333. The next prime is 2681692399. The reversal of 2681692381 is 1832961862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1637820900 + 1043871481 = 40470^2 + 32309^2 .

It is a cyclic number.

It is not a de Polignac number, because 2681692381 - 2¹³ = 2681684189 is a prime.

It is a super-2 number, since 2×2681692381² = 14382948052626898322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2681692681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340846190 + 1340846191.

It is an arithmetic number, because the mean of its divisors is an integer number (1340846191).

Almost surely, 2^2681692381 is an apocalyptic number.

It is an amenable number.

2681692381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2681692381 is an equidigital number, since it uses as much as digits as its factorization.

2681692381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 46.

The square root of 2681692381 is about 51785.0594380271. The cubic root of 2681692381 is about 1389.3222341412.

The spelling of 2681692381 in words is "two billion, six hundred eighty-one million, six hundred ninety-two thousand, three hundred eighty-one".