153971 has 4 divisors (see below), whose sum is σ = 156000. Its totient is φ = 151944.

The previous prime is 153953. The next prime is 153991. The reversal of 153971 is 179351.

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 153971 - 2¹⁰ = 152947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 153971.

It is not an unprimeable number, because it can be changed into a prime (153911) 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, 896 + ... + 1053.

It is an arithmetic number, because the mean of its divisors is an integer number (39000).

2¹⁵³⁹⁷¹ is an apocalyptic number.

153971 is a deficient number, since it is larger than the sum of its proper divisors (2029).

153971 is an equidigital number, since it uses as much as digits as its factorization.

153971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028.

The product of its digits is 945, while the sum is 26.

The square root of 153971 is about 392.3913862459. The cubic root of 153971 is about 53.5977193282.

The spelling of 153971 in words is "one hundred fifty-three thousand, nine hundred seventy-one".