145199269 has 2 divisors, whose sum is σ = 145199270. Its totient is φ = 145199268.

The previous prime is 145199267. The next prime is 145199279. The reversal of 145199269 is 962991541.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103428900 + 41770369 = 10170^2 + 6463^2 .

It is an emirp because it is prime and its reverse (962991541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145199269 - 2¹ = 145199267 is a prime.

It is a super-2 number, since 2×145199269² = 42165655436268722, which contains 22 as substring.

Together with 145199267, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145199267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72599634 + 72599635.

It is an arithmetic number, because the mean of its divisors is an integer number (72599635).

Almost surely, 2^145199269 is an apocalyptic number.

It is an amenable number.

145199269 is a deficient number, since it is larger than the sum of its proper divisors (1).

145199269 is an equidigital number, since it uses as much as digits as its factorization.

145199269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 46.

The square root of 145199269 is about 12049.8659328641. The cubic root of 145199269 is about 525.5993385146.

The spelling of 145199269 in words is "one hundred forty-five million, one hundred ninety-nine thousand, two hundred sixty-nine".