1170138923 has 2 divisors, whose sum is σ = 1170138924. Its totient is φ = 1170138922.

The previous prime is 1170138911. The next prime is 1170138947. The reversal of 1170138923 is 3298310711.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (3298310711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1170138923 - 2²⁶ = 1103030059 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1170138223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585069461 + 585069462.

It is an arithmetic number, because the mean of its divisors is an integer number (585069462).

Almost surely, 2^1170138923 is an apocalyptic number.

1170138923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1170138923 is an equidigital number, since it uses as much as digits as its factorization.

1170138923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 1170138923 is about 34207.2934182171. The cubic root of 1170138923 is about 1053.7699471023.

The spelling of 1170138923 in words is "one billion, one hundred seventy million, one hundred thirty-eight thousand, nine hundred twenty-three".