145047169 has 2 divisors, whose sum is σ = 145047170. Its totient is φ = 145047168.

The previous prime is 145047163. The next prime is 145047173. The reversal of 145047169 is 961740541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137757169 + 7290000 = 11737^2 + 2700^2 .

It is a cyclic number.

It is not a de Polignac number, because 145047169 - 2¹⁹ = 144522881 is a prime.

It is a super-2 number, since 2×145047169² = 42077362469829122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145047163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72523584 + 72523585.

It is an arithmetic number, because the mean of its divisors is an integer number (72523585).

Almost surely, 2^145047169 is an apocalyptic number.

It is an amenable number.

145047169 is a deficient number, since it is larger than the sum of its proper divisors (1).

145047169 is an equidigital number, since it uses as much as digits as its factorization.

145047169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 145047169 is about 12043.5530056541. The cubic root of 145047169 is about 525.4157480816.

The spelling of 145047169 in words is "one hundred forty-five million, forty-seven thousand, one hundred sixty-nine".