157173173 has 4 divisors (see below), whose sum is σ = 157217088. Its totient is φ = 157129260.

The previous prime is 157173157. The next prime is 157173209. The reversal of 157173173 is 371371751.

It is a happy number.

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: 371371751 = 1301 ⋅285451.

It is a cyclic number.

It is not a de Polignac number, because 157173173 - 2⁴ = 157173157 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 (157173103) 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, 16061 + ... + 23922.

It is an arithmetic number, because the mean of its divisors is an integer number (39304272).

Almost surely, 2^157173173 is an apocalyptic number.

It is an amenable number.

157173173 is a deficient number, since it is larger than the sum of its proper divisors (43915).

157173173 is an equidigital number, since it uses as much as digits as its factorization.

157173173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43914.

The product of its digits is 15435, while the sum is 35.

The square root of 157173173 is about 12536.8725366417. The cubic root of 157173173 is about 539.6673454151.

The spelling of 157173173 in words is "one hundred fifty-seven million, one hundred seventy-three thousand, one hundred seventy-three".