149973 has 4 divisors (see below), whose sum is σ = 199968. Its totient is φ = 99980.

The previous prime is 149971. The next prime is 149993. The reversal of 149973 is 379941.

149973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 149973 - 2¹ = 149971 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149971) 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, 24993 + ... + 24998.

It is an arithmetic number, because the mean of its divisors is an integer number (49992).

2¹⁴⁹⁹⁷³ is an apocalyptic number.

It is an amenable number.

149973 is a deficient number, since it is larger than the sum of its proper divisors (49995).

149973 is an equidigital number, since it uses as much as digits as its factorization.

149973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49994.

The product of its digits is 6804, while the sum is 33.

The square root of 149973 is about 387.2634762019. The cubic root of 149973 is about 53.1297402921.

The spelling of 149973 in words is "one hundred forty-nine thousand, nine hundred seventy-three".