172147057 has 8 divisors (see below), whose sum is σ = 174073536. Its totient is φ = 170226672.

The previous prime is 172147037. The next prime is 172147121. The reversal of 172147057 is 750741271.

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

It is a cyclic number.

It is not a de Polignac number, because 172147057 - 2¹⁵ = 172114289 is a prime.

It is a super-2 number, since 2×172147057² = 59269218467522498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172147037) 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 7 ways as a sum of consecutive naturals, for example, 76683 + ... + 78895.

It is an arithmetic number, because the mean of its divisors is an integer number (21759192).

Almost surely, 2^172147057 is an apocalyptic number.

It is an amenable number.

172147057 is a deficient number, since it is larger than the sum of its proper divisors (1926479).

172147057 is a wasteful number, since it uses less digits than its factorization.

172147057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3047.

The product of its (nonzero) digits is 13720, while the sum is 34.

The square root of 172147057 is about 13120.4823463164. The cubic root of 172147057 is about 556.2882252568.

The spelling of 172147057 in words is "one hundred seventy-two million, one hundred forty-seven thousand, fifty-seven".