72100207 has 4 divisors (see below), whose sum is σ = 73777000. Its totient is φ = 70423416.

The previous prime is 72100199. The next prime is 72100229. The reversal of 72100207 is 70200127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70200127 = 367 ⋅191281.

It is a cyclic number.

It is not a de Polignac number, because 72100207 - 2³ = 72100199 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 (72100277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 838332 + ... + 838417.

It is an arithmetic number, because the mean of its divisors is an integer number (18444250).

Almost surely, 2^72100207 is an apocalyptic number.

72100207 is a deficient number, since it is larger than the sum of its proper divisors (1676793).

72100207 is a wasteful number, since it uses less digits than its factorization.

72100207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676792.

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 72100207 is about 8491.1840752630. The cubic root of 72100207 is about 416.2096741799.

The spelling of 72100207 in words is "seventy-two million, one hundred thousand, two hundred seven".