371687081 has 2 divisors, whose sum is σ = 371687082. Its totient is φ = 371687080.

The previous prime is 371687053. The next prime is 371687093. The reversal of 371687081 is 180786173.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 318265600 + 53421481 = 17840^2 + 7309^2 .

It is an emirp because it is prime and its reverse (180786173) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 371687081 - 2¹⁰ = 371686057 is a prime.

It is a super-2 number, since 2×371687081² = 276302572364601122, which contains 22 as substring.

It is a Chen prime.

It is equal to p_19903667 and since 371687081 and 19903667 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (371687011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 185843540 + 185843541.

It is an arithmetic number, because the mean of its divisors is an integer number (185843541).

Almost surely, 2^371687081 is an apocalyptic number.

It is an amenable number.

371687081 is a deficient number, since it is larger than the sum of its proper divisors (1).

371687081 is an equidigital number, since it uses as much as digits as its factorization.

371687081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 371687081 is about 19279.1877681608. The cubic root of 371687081 is about 718.9949202772.

The spelling of 371687081 in words is "three hundred seventy-one million, six hundred eighty-seven thousand, eighty-one".