145166399 has 4 divisors (see below), whose sum is σ = 165904464. Its totient is φ = 124428336.

The previous prime is 145166389. The next prime is 145166401. The reversal of 145166399 is 993661541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145166399 - 2⁸ = 145166143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145166389) 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, 10369022 + ... + 10369035.

It is an arithmetic number, because the mean of its divisors is an integer number (41476116).

Almost surely, 2^145166399 is an apocalyptic number.

145166399 is a deficient number, since it is larger than the sum of its proper divisors (20738065).

145166399 is an equidigital number, since it uses as much as digits as its factorization.

145166399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20738064.

The product of its digits is 174960, while the sum is 44.

The square root of 145166399 is about 12048.5019400754. The cubic root of 145166399 is about 525.5596740493.

The spelling of 145166399 in words is "one hundred forty-five million, one hundred sixty-six thousand, three hundred ninety-nine".