145199953 has 4 divisors (see below), whose sum is σ = 145545268. Its totient is φ = 144854640.

The previous prime is 145199917. The next prime is 145199981. The reversal of 145199953 is 359991541.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 73153809 + 72046144 = 8553^2 + 8488^2 .

It is a cyclic number.

It is not a de Polignac number, because 145199953 - 2¹⁷ = 145068881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145109953) 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, 172026 + ... + 172867.

It is an arithmetic number, because the mean of its divisors is an integer number (36386317).

Almost surely, 2^145199953 is an apocalyptic number.

It is an amenable number.

145199953 is a deficient number, since it is larger than the sum of its proper divisors (345315).

145199953 is an equidigital number, since it uses as much as digits as its factorization.

145199953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345314.

The product of its digits is 218700, while the sum is 46.

The square root of 145199953 is about 12049.8943148892. The cubic root of 145199953 is about 525.6001638387.

The spelling of 145199953 in words is "one hundred forty-five million, one hundred ninety-nine thousand, nine hundred fifty-three".