1165023173 has 2 divisors, whose sum is σ = 1165023174. Its totient is φ = 1165023172.

The previous prime is 1165023149. The next prime is 1165023221. The reversal of 1165023173 is 3713205611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1093823329 + 71199844 = 33073^2 + 8438^2 .

It is a cyclic number.

It is not a de Polignac number, because 1165023173 - 2¹² = 1165019077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1165023143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582511586 + 582511587.

It is an arithmetic number, because the mean of its divisors is an integer number (582511587).

Almost surely, 2^1165023173 is an apocalyptic number.

It is an amenable number.

1165023173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165023173 is an equidigital number, since it uses as much as digits as its factorization.

1165023173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 1165023173 is about 34132.4357906083. The cubic root of 1165023173 is about 1052.2320388776.

Adding to 1165023173 its reverse (3713205611), we get a palindrome (4878228784).

The spelling of 1165023173 in words is "one billion, one hundred sixty-five million, twenty-three thousand, one hundred seventy-three".