145779181 has 2 divisors, whose sum is σ = 145779182. Its totient is φ = 145779180.

The previous prime is 145779163. The next prime is 145779197. The reversal of 145779181 is 181977541.

145779181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139358025 + 6421156 = 11805^2 + 2534^2 .

It is a cyclic number.

It is not a de Polignac number, because 145779181 - 2²¹ = 143682029 is a prime.

It is a super-3 number, since 3×145779181³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145779121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72889590 + 72889591.

It is an arithmetic number, because the mean of its divisors is an integer number (72889591).

Almost surely, 2^145779181 is an apocalyptic number.

It is an amenable number.

145779181 is a deficient number, since it is larger than the sum of its proper divisors (1).

145779181 is an equidigital number, since it uses as much as digits as its factorization.

145779181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 43.

The square root of 145779181 is about 12073.9049606993. The cubic root of 145779181 is about 526.2981401940.

The spelling of 145779181 in words is "one hundred forty-five million, seven hundred seventy-nine thousand, one hundred eighty-one".