72417207 has 4 divisors (see below), whose sum is σ = 96556280. Its totient is φ = 48278136.

The previous prime is 72417181. The next prime is 72417217. The reversal of 72417207 is 70271427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70271427 = 3 ⋅23423809.

It is not a de Polignac number, because 72417207 - 2⁶ = 72417143 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 (72417217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12069532 + ... + 12069537.

It is an arithmetic number, because the mean of its divisors is an integer number (24139070).

Almost surely, 2^72417207 is an apocalyptic number.

72417207 is a deficient number, since it is larger than the sum of its proper divisors (24139073).

72417207 is a wasteful number, since it uses less digits than its factorization.

72417207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24139072.

The product of its (nonzero) digits is 5488, while the sum is 30.

The square root of 72417207 is about 8509.8300218042. The cubic root of 72417207 is about 416.8187596935.

The spelling of 72417207 in words is "seventy-two million, four hundred seventeen thousand, two hundred seven".