72070003 has 4 divisors (see below), whose sum is σ = 72387720. Its totient is φ = 71752288.

The previous prime is 72070001. The next prime is 72070051. The reversal of 72070003 is 30007027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30007027 = 3923 ⋅7649.

It is a cyclic number.

It is not a de Polignac number, because 72070003 - 2¹ = 72070001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72070001) 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, 158518 + ... + 158971.

It is an arithmetic number, because the mean of its divisors is an integer number (18096930).

Almost surely, 2^72070003 is an apocalyptic number.

72070003 is a deficient number, since it is larger than the sum of its proper divisors (317717).

72070003 is a wasteful number, since it uses less digits than its factorization.

72070003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317716.

The product of its (nonzero) digits is 294, while the sum is 19.

The square root of 72070003 is about 8489.4053384204. The cubic root of 72070003 is about 416.1515469643.

The spelling of 72070003 in words is "seventy-two million, seventy thousand, three".