2687042381 has 2 divisors, whose sum is σ = 2687042382. Its totient is φ = 2687042380.

The previous prime is 2687042353. The next prime is 2687042399. The reversal of 2687042381 is 1832407862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2514119881 + 172922500 = 50141^2 + 13150^2 .

It is a cyclic number.

It is not a de Polignac number, because 2687042381 - 2¹⁸ = 2686780237 is a prime.

It is a super-2 number, since 2×2687042381² = 14440393514580298322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2687041381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1343521190 + 1343521191.

It is an arithmetic number, because the mean of its divisors is an integer number (1343521191).

Almost surely, 2^2687042381 is an apocalyptic number.

It is an amenable number.

2687042381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2687042381 is an equidigital number, since it uses as much as digits as its factorization.

2687042381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 2687042381 is about 51836.6895258561. The cubic root of 2687042381 is about 1390.2455238013.

The spelling of 2687042381 in words is "two billion, six hundred eighty-seven million, forty-two thousand, three hundred eighty-one".