148921109 has 4 divisors (see below), whose sum is σ = 149447616. Its totient is φ = 148394604.

The previous prime is 148921103. The next prime is 148921121. The reversal of 148921109 is 901129841.

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, and also an emirpimes, since its reverse is a distinct semiprime: 901129841 = 2089 ⋅431369.

It is a cyclic number.

It is not a de Polignac number, because 148921109 - 2¹⁶ = 148855573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148921103) 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, 262829 + ... + 263394.

It is an arithmetic number, because the mean of its divisors is an integer number (37361904).

Almost surely, 2^148921109 is an apocalyptic number.

It is an amenable number.

148921109 is a deficient number, since it is larger than the sum of its proper divisors (526507).

148921109 is an equidigital number, since it uses as much as digits as its factorization.

148921109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526506.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 148921109 is about 12203.3236866028. The cubic root of 148921109 is about 530.0523373022.

The spelling of 148921109 in words is "one hundred forty-eight million, nine hundred twenty-one thousand, one hundred nine".