171389949 has 4 divisors (see below), whose sum is σ = 228519936. Its totient is φ = 114259964.

The previous prime is 171389941. The next prime is 171389987. The reversal of 171389949 is 949983171.

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.

It is a cyclic number.

It is not a de Polignac number, because 171389949 - 2³ = 171389941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171389941) 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, 28564989 + ... + 28564994.

It is an arithmetic number, because the mean of its divisors is an integer number (57129984).

Almost surely, 2^171389949 is an apocalyptic number.

It is an amenable number.

171389949 is a deficient number, since it is larger than the sum of its proper divisors (57129987).

171389949 is an equidigital number, since it uses as much as digits as its factorization.

171389949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57129986.

The product of its digits is 489888, while the sum is 51.

The square root of 171389949 is about 13091.5984127226. The cubic root of 171389949 is about 555.4715025742.

The spelling of 171389949 in words is "one hundred seventy-one million, three hundred eighty-nine thousand, nine hundred forty-nine".