1185020923 has 2 divisors, whose sum is σ = 1185020924. Its totient is φ = 1185020922.

The previous prime is 1185020873. The next prime is 1185021031. The reversal of 1185020923 is 3290205811.

It is a weak prime.

It is an emirp because it is prime and its reverse (3290205811) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1185020923 is a prime.

It is not a weakly prime, because it can be changed into another prime (1185024923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 592510461 + 592510462.

It is an arithmetic number, because the mean of its divisors is an integer number (592510462).

Almost surely, 2^1185020923 is an apocalyptic number.

1185020923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1185020923 is an equidigital number, since it uses as much as digits as its factorization.

1185020923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1185020923 is about 34424.1328576335. The cubic root of 1185020923 is about 1058.2184751014.

The spelling of 1185020923 in words is "one billion, one hundred eighty-five million, twenty thousand, nine hundred twenty-three".