173921157 has 6 divisors (see below), whose sum is σ = 251219462. Its totient is φ = 115947432.

The previous prime is 173921141. The next prime is 173921159. The reversal of 173921157 is 751129371.

It can be written as a sum of positive squares in only one way, i.e., 163481796 + 10439361 = 12786^2 + 3231^2 .

It is not a de Polignac number, because 173921157 - 2⁴ = 173921141 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 (173921159) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9662278 + ... + 9662295.

Almost surely, 2^173921157 is an apocalyptic number.

It is an amenable number.

173921157 is a deficient number, since it is larger than the sum of its proper divisors (77298305).

173921157 is a wasteful number, since it uses less digits than its factorization.

173921157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19324579 (or 19324576 counting only the distinct ones).

The product of its digits is 13230, while the sum is 36.

The square root of 173921157 is about 13187.9170834518. The cubic root of 173921157 is about 558.1926821376.

The spelling of 173921157 in words is "one hundred seventy-three million, nine hundred twenty-one thousand, one hundred fifty-seven".