149972071 has 4 divisors (see below), whose sum is σ = 150013144. Its totient is φ = 149931000.

The previous prime is 149972057. The next prime is 149972083. The reversal of 149972071 is 170279941.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 149972071 - 2¹⁹ = 149447783 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 (149972051) 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, 14460 + ... + 22561.

It is an arithmetic number, because the mean of its divisors is an integer number (37503286).

Almost surely, 2^149972071 is an apocalyptic number.

149972071 is a deficient number, since it is larger than the sum of its proper divisors (41073).

149972071 is an equidigital number, since it uses as much as digits as its factorization.

149972071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41072.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 149972071 is about 12246.3084641863. The cubic root of 149972071 is about 531.2963058876.

The spelling of 149972071 in words is "one hundred forty-nine million, nine hundred seventy-two thousand, seventy-one".