145418869 has 2 divisors, whose sum is σ = 145418870. Its totient is φ = 145418868.

The previous prime is 145418851. The next prime is 145418921. The reversal of 145418869 is 968814541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131446225 + 13972644 = 11465^2 + 3738^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145418869 is a prime.

It is a super-2 number, since 2×145418869² = 42293294922478322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145418849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72709434 + 72709435.

It is an arithmetic number, because the mean of its divisors is an integer number (72709435).

Almost surely, 2^145418869 is an apocalyptic number.

It is an amenable number.

145418869 is a deficient number, since it is larger than the sum of its proper divisors (1).

145418869 is an equidigital number, since it uses as much as digits as its factorization.

145418869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 46.

The square root of 145418869 is about 12058.9746247349. The cubic root of 145418869 is about 525.8641779460.

The spelling of 145418869 in words is "one hundred forty-five million, four hundred eighteen thousand, eight hundred sixty-nine".