172109148 has 24 divisors (see below), whose sum is σ = 414543360. Its totient is φ = 55518960.

The previous prime is 172109143. The next prime is 172109153. The reversal of 172109148 is 841901271.

It is an interprime number because it is at equal distance from previous prime (172109143) and next prime (172109153).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172109143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230958 + ... + 231701.

It is an arithmetic number, because the mean of its divisors is an integer number (17272640).

Almost surely, 2^172109148 is an apocalyptic number.

It is an amenable number.

172109148 is an abundant number, since it is smaller than the sum of its proper divisors (242434212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172109148 is a wasteful number, since it uses less digits than its factorization.

172109148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462697 (or 462695 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 172109148 is about 13119.0376171425. The cubic root of 172109148 is about 556.2473883141.

The spelling of 172109148 in words is "one hundred seventy-two million, one hundred nine thousand, one hundred forty-eight".