72649003 has 4 divisors (see below), whose sum is σ = 83027440. Its totient is φ = 62270568.

The previous prime is 72648991. The next prime is 72649013. The reversal of 72649003 is 30094627.

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 72649003 - 2¹⁷ = 72517931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72649013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5189208 + ... + 5189221.

It is an arithmetic number, because the mean of its divisors is an integer number (20756860).

Almost surely, 2^72649003 is an apocalyptic number.

72649003 is a deficient number, since it is larger than the sum of its proper divisors (10378437).

72649003 is a wasteful number, since it uses less digits than its factorization.

72649003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10378436.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 72649003 is about 8523.4384493583. The cubic root of 72649003 is about 417.2630096308.

It can be divided in two parts, 726 and 49003, that added together give a square (49729 = 223²).

The spelling of 72649003 in words is "seventy-two million, six hundred forty-nine thousand, three".