153973 has 4 divisors (see below), whose sum is σ = 155520. Its totient is φ = 152428.

The previous prime is 153953. The next prime is 153991. The reversal of 153973 is 379351.

153973 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

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, and also an emirpimes, since its reverse is a distinct semiprime: 379351 = 7 ⋅54193.

It is a cyclic number.

It is not a de Polignac number, because 153973 - 2⁵ = 153941 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a zygodrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153913) 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, 613 + ... + 826.

It is an arithmetic number, because the mean of its divisors is an integer number (38880).

2¹⁵³⁹⁷³ is an apocalyptic number.

It is an amenable number.

153973 is a deficient number, since it is larger than the sum of its proper divisors (1547).

153973 is a wasteful number, since it uses less digits than its factorization.

153973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546.

The product of its digits is 2835, while the sum is 28.

The square root of 153973 is about 392.3939347136. The cubic root of 153973 is about 53.5979513957.

It can be divided in two parts, 15397 and 3, that added together give a triangular number (15400 = T₁₇₅).

The spelling of 153973 in words is "one hundred fifty-three thousand, nine hundred seventy-three".