149395553 has 4 divisors (see below), whose sum is σ = 149430468. Its totient is φ = 149360640.

The previous prime is 149395549. The next prime is 149395577. The reversal of 149395553 is 355593941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355593941 = 2677 ⋅132833.

It can be written as a sum of positive squares in 2 ways, for example, as 73479184 + 75916369 = 8572^2 + 8713^2 .

It is a cyclic number.

It is not a de Polignac number, because 149395553 - 2² = 149395549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (149395583) 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, 9968 + ... + 19953.

It is an arithmetic number, because the mean of its divisors is an integer number (37357617).

Almost surely, 2^149395553 is an apocalyptic number.

It is an amenable number.

149395553 is a deficient number, since it is larger than the sum of its proper divisors (34915).

149395553 is an equidigital number, since it uses as much as digits as its factorization.

149395553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34914.

The product of its digits is 364500, while the sum is 44.

The square root of 149395553 is about 12222.7473589206. The cubic root of 149395553 is about 530.6146340401.

The spelling of 149395553 in words is "one hundred forty-nine million, three hundred ninety-five thousand, five hundred fifty-three".