1156785923 has 2 divisors, whose sum is σ = 1156785924. Its totient is φ = 1156785922.

The previous prime is 1156785869. The next prime is 1156785947. The reversal of 1156785923 is 3295876511.

It is a strong prime.

It is an emirp because it is prime and its reverse (3295876511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1156785923 - 2¹² = 1156781827 is a prime.

It is not a weakly prime, because it can be changed into another prime (1156785983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578392961 + 578392962.

It is an arithmetic number, because the mean of its divisors is an integer number (578392962).

Almost surely, 2^1156785923 is an apocalyptic number.

1156785923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156785923 is an equidigital number, since it uses as much as digits as its factorization.

1156785923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 47.

The square root of 1156785923 is about 34011.5557274289. Note that the first 3 decimals coincide. The cubic root of 1156785923 is about 1049.7462494905.

The spelling of 1156785923 in words is "one billion, one hundred fifty-six million, seven hundred eighty-five thousand, nine hundred twenty-three".