72203983 has 4 divisors (see below), whose sum is σ = 74155480. Its totient is φ = 70252488.

The previous prime is 72203959. The next prime is 72204001. The reversal of 72203983 is 38930227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38930227 = 7 ⋅5561461.

It is a cyclic number.

It is not a de Polignac number, because 72203983 - 2⁵ = 72203951 is a prime.

It is a super-2 number, since 2×72203983² = 10426830322128578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72203903) 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, 975693 + ... + 975766.

It is an arithmetic number, because the mean of its divisors is an integer number (18538870).

Almost surely, 2^72203983 is an apocalyptic number.

72203983 is a deficient number, since it is larger than the sum of its proper divisors (1951497).

72203983 is a wasteful number, since it uses less digits than its factorization.

72203983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951496.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 72203983 is about 8497.2926864973. The cubic root of 72203983 is about 416.4092661585.

The spelling of 72203983 in words is "seventy-two million, two hundred three thousand, nine hundred eighty-three".