1138947937 has 2 divisors, whose sum is σ = 1138947938. Its totient is φ = 1138947936.

The previous prime is 1138947917. The next prime is 1138947961. The reversal of 1138947937 is 7397498311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 900060001 + 238887936 = 30001^2 + 15456^2 .

It is a cyclic number.

It is not a de Polignac number, because 1138947937 - 2⁷ = 1138947809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1138947917) 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, 569473968 + 569473969.

It is an arithmetic number, because the mean of its divisors is an integer number (569473969).

Almost surely, 2^1138947937 is an apocalyptic number.

It is an amenable number.

1138947937 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138947937 is an equidigital number, since it uses as much as digits as its factorization.

1138947937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 52.

The square root of 1138947937 is about 33748.3027276928. The cubic root of 1138947937 is about 1044.3224737575.

The spelling of 1138947937 in words is "one billion, one hundred thirty-eight million, nine hundred forty-seven thousand, nine hundred thirty-seven".