2691002381 has 2 divisors, whose sum is σ = 2691002382. Its totient is φ = 2691002380.

The previous prime is 2691002333. The next prime is 2691002383. The reversal of 2691002381 is 1832001962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1822521481 + 868480900 = 42691^2 + 29470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2691002381 is a prime.

It is a super-2 number, since 2×2691002381² = 14482987629095338322, which contains 22 as substring.

Together with 2691002383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2691002383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345501190 + 1345501191.

It is an arithmetic number, because the mean of its divisors is an integer number (1345501191).

Almost surely, 2^2691002381 is an apocalyptic number.

It is an amenable number.

2691002381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2691002381 is an equidigital number, since it uses as much as digits as its factorization.

2691002381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 2691002381 is about 51874.8723468309. The cubic root of 2691002381 is about 1390.9281417397.

The spelling of 2691002381 in words is "two billion, six hundred ninety-one million, two thousand, three hundred eighty-one".