145969177 has 2 divisors, whose sum is σ = 145969178. Its totient is φ = 145969176.

The previous prime is 145969171. The next prime is 145969199. The reversal of 145969177 is 771969541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112975641 + 32993536 = 10629^2 + 5744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145969177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145969177.

It is not a weakly prime, because it can be changed into another prime (145969171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72984588 + 72984589.

It is an arithmetic number, because the mean of its divisors is an integer number (72984589).

Almost surely, 2^145969177 is an apocalyptic number.

It is an amenable number.

145969177 is a deficient number, since it is larger than the sum of its proper divisors (1).

145969177 is an equidigital number, since it uses as much as digits as its factorization.

145969177 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 49.

The square root of 145969177 is about 12081.7704414543. The cubic root of 145969177 is about 526.5266847885.

The spelling of 145969177 in words is "one hundred forty-five million, nine hundred sixty-nine thousand, one hundred seventy-seven".