145869169 has 4 divisors (see below), whose sum is σ = 145926144. Its totient is φ = 145812196.

The previous prime is 145869161. The next prime is 145869173. The reversal of 145869169 is 961968541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145869169 - 2³ = 145869161 is a prime.

It is a super-2 number, since 2×145869169² = 42555628929501122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145869161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24457 + ... + 29830.

It is an arithmetic number, because the mean of its divisors is an integer number (36481536).

Almost surely, 2^145869169 is an apocalyptic number.

It is an amenable number.

145869169 is a deficient number, since it is larger than the sum of its proper divisors (56975).

145869169 is an equidigital number, since it uses as much as digits as its factorization.

145869169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56974.

The product of its digits is 466560, while the sum is 49.

The square root of 145869169 is about 12077.6309349143. The cubic root of 145869169 is about 526.4064107417.

The spelling of 145869169 in words is "one hundred forty-five million, eight hundred sixty-nine thousand, one hundred sixty-nine".