149775253 has 4 divisors (see below), whose sum is σ = 158585580. Its totient is φ = 140964928.

The previous prime is 149775193. The next prime is 149775257. The reversal of 149775253 is 352577941.

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 92121604 + 57653649 = 9598^2 + 7593^2 .

It is a cyclic number.

It is not a de Polignac number, because 149775253 - 2²⁵ = 116220821 is a prime.

It is a super-2 number, since 2×149775253² = 44865252822428018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149775257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4405138 + ... + 4405171.

It is an arithmetic number, because the mean of its divisors is an integer number (39646395).

Almost surely, 2^149775253 is an apocalyptic number.

It is an amenable number.

149775253 is a deficient number, since it is larger than the sum of its proper divisors (8810327).

149775253 is an equidigital number, since it uses as much as digits as its factorization.

149775253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8810326.

The product of its digits is 264600, while the sum is 43.

The square root of 149775253 is about 12238.2700166323. The cubic root of 149775253 is about 531.0637860299.

The spelling of 149775253 in words is "one hundred forty-nine million, seven hundred seventy-five thousand, two hundred fifty-three".