172316407 has 4 divisors (see below), whose sum is σ = 172436616. Its totient is φ = 172196200.

The previous prime is 172316393. The next prime is 172316447. The reversal of 172316407 is 704613271.

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 172316407 - 2⁷ = 172316279 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 (172316447) 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, 57928 + ... + 60829.

It is an arithmetic number, because the mean of its divisors is an integer number (43109154).

Almost surely, 2^172316407 is an apocalyptic number.

172316407 is a deficient number, since it is larger than the sum of its proper divisors (120209).

172316407 is a wasteful number, since it uses less digits than its factorization.

172316407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120208.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 172316407 is about 13126.9344098308. The cubic root of 172316407 is about 556.4705820108.

Adding to 172316407 its reverse (704613271), we get a palindrome (876929678).

The spelling of 172316407 in words is "one hundred seventy-two million, three hundred sixteen thousand, four hundred seven".