171972974 has 8 divisors (see below), whose sum is σ = 258089328. Its totient is φ = 85943200.

The previous prime is 171972973. The next prime is 171972991. The reversal of 171972974 is 479279171.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171972973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16427 + ... + 24774.

It is an arithmetic number, because the mean of its divisors is an integer number (32261166).

Almost surely, 2^171972974 is an apocalyptic number.

171972974 is a deficient number, since it is larger than the sum of its proper divisors (86116354).

171972974 is a wasteful number, since it uses less digits than its factorization.

171972974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43290.

The product of its digits is 222264, while the sum is 47.

The square root of 171972974 is about 13113.8466515359. The cubic root of 171972974 is about 556.1006472905.

The spelling of 171972974 in words is "one hundred seventy-one million, nine hundred seventy-two thousand, nine hundred seventy-four".