1937539081 has 2 divisors, whose sum is σ = 1937539082. Its totient is φ = 1937539080.

The previous prime is 1937539057. The next prime is 1937539099. The reversal of 1937539081 is 1809357391.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1900524025 + 37015056 = 43595^2 + 6084^2 .

It is a cyclic number.

It is not a de Polignac number, because 1937539081 - 2⁵ = 1937539049 is a prime.

It is a super-2 number, since 2×1937539081² = 7508115380804649122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1937539781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 968769540 + 968769541.

It is an arithmetic number, because the mean of its divisors is an integer number (968769541).

Almost surely, 2^1937539081 is an apocalyptic number.

It is an amenable number.

1937539081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1937539081 is an equidigital number, since it uses as much as digits as its factorization.

1937539081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 46.

The square root of 1937539081 is about 44017.4860822378. The cubic root of 1937539081 is about 1246.6661200474. Note that the first 3 decimals are identical.

The spelling of 1937539081 in words is "one billion, nine hundred thirty-seven million, five hundred thirty-nine thousand, eighty-one".