672521503 has 4 divisors (see below), whose sum is σ = 674670448. Its totient is φ = 670372560.

The previous prime is 672521491. The next prime is 672521519. The reversal of 672521503 is 305125276.

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 672521503 - 2¹³ = 672513311 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 (672521593) 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, 1074003 + ... + 1074628.

It is an arithmetic number, because the mean of its divisors is an integer number (168667612).

Almost surely, 2^672521503 is an apocalyptic number.

672521503 is a deficient number, since it is larger than the sum of its proper divisors (2148945).

672521503 is a wasteful number, since it uses less digits than its factorization.

672521503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148944.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 672521503 is about 25933.0195503725. The cubic root of 672521503 is about 876.1303499828.

Adding to 672521503 its reverse (305125276), we get a palindrome (977646779).

The spelling of 672521503 in words is "six hundred seventy-two million, five hundred twenty-one thousand, five hundred three".