1356545173 has 2 divisors, whose sum is σ = 1356545174. Its totient is φ = 1356545172.

The previous prime is 1356545167. The next prime is 1356545219. The reversal of 1356545173 is 3715456531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1285007409 + 71537764 = 35847^2 + 8458^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1356545173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1356545143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678272586 + 678272587.

It is an arithmetic number, because the mean of its divisors is an integer number (678272587).

Almost surely, 2^1356545173 is an apocalyptic number.

It is an amenable number.

1356545173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356545173 is an equidigital number, since it uses as much as digits as its factorization.

1356545173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189000, while the sum is 40.

The square root of 1356545173 is about 36831.3069683931. The cubic root of 1356545173 is about 1106.9926910660.

The spelling of 1356545173 in words is "one billion, three hundred fifty-six million, five hundred forty-five thousand, one hundred seventy-three".