72003023 has 4 divisors (see below), whose sum is σ = 72054840. Its totient is φ = 71951208.

The previous prime is 72002981. The next prime is 72003037. The reversal of 72003023 is 32030027.

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 72003023 - 2⁸ = 72002767 is a prime.

It is a super-2 number, since 2×72003023² = 10368870642277058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72002992 and 72003010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72003053) 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, 23765 + ... + 26622.

It is an arithmetic number, because the mean of its divisors is an integer number (18013710).

Almost surely, 2^72003023 is an apocalyptic number.

72003023 is a deficient number, since it is larger than the sum of its proper divisors (51817).

72003023 is a wasteful number, since it uses less digits than its factorization.

72003023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51816.

The product of its (nonzero) digits is 252, while the sum is 17.

The square root of 72003023 is about 8485.4595043521. The cubic root of 72003023 is about 416.0225868376.

The spelling of 72003023 in words is "seventy-two million, three thousand, twenty-three".