100172207 has 4 divisors (see below), whose sum is σ = 100492560. Its totient is φ = 99851856.

The previous prime is 100172203. The next prime is 100172249. The reversal of 100172207 is 702271001.

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 100172207 - 2² = 100172203 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 (100172203) 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, 159707 + ... + 160332.

It is an arithmetic number, because the mean of its divisors is an integer number (25123140).

Almost surely, 2^100172207 is an apocalyptic number.

100172207 is a deficient number, since it is larger than the sum of its proper divisors (320353).

100172207 is an equidigital number, since it uses as much as digits as its factorization.

100172207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320352.

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 100172207 is about 10008.6066462820. The cubic root of 100172207 is about 464.4251685952.

The spelling of 100172207 in words is "one hundred million, one hundred seventy-two thousand, two hundred seven".