149971871 has 8 divisors (see below), whose sum is σ = 172146720. Its totient is φ = 127984608.

The previous prime is 149971867. The next prime is 149971873. The reversal of 149971871 is 178179941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 149971871 - 2² = 149971867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149971873) 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, 45176 + ... + 48381.

It is an arithmetic number, because the mean of its divisors is an integer number (21518340).

Almost surely, 2^149971871 is an apocalyptic number.

149971871 is a deficient number, since it is larger than the sum of its proper divisors (22174849).

149971871 is an equidigital number, since it uses as much as digits as its factorization.

149971871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93793.

The product of its digits is 127008, while the sum is 47.

The square root of 149971871 is about 12246.3002984575. The cubic root of 149971871 is about 531.2960697118.

The spelling of 149971871 in words is "one hundred forty-nine million, nine hundred seventy-one thousand, eight hundred seventy-one".