172668071 has 4 divisors (see below), whose sum is σ = 172864944. Its totient is φ = 172471200.

The previous prime is 172668049. The next prime is 172668077. The reversal of 172668071 is 170866271.

172668071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172668071 - 2¹⁸ = 172405927 is a prime.

It is a super-2 number, since 2×172668071² = 59628525485722082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172668077) 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, 97115 + ... + 98876.

It is an arithmetic number, because the mean of its divisors is an integer number (43216236).

Almost surely, 2^172668071 is an apocalyptic number.

172668071 is a deficient number, since it is larger than the sum of its proper divisors (196873).

172668071 is an equidigital number, since it uses as much as digits as its factorization.

172668071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196872.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 172668071 is about 13140.3223324240. The cubic root of 172668071 is about 556.8488739038.

The spelling of 172668071 in words is "one hundred seventy-two million, six hundred sixty-eight thousand, seventy-one".