673762521 has 4 divisors (see below), whose sum is σ = 898350032. Its totient is φ = 449175012.

The previous prime is 673762499. The next prime is 673762541. The reversal of 673762521 is 125267376.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 673762521 - 2⁹ = 673762009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 673762521.

It is not an unprimeable number, because it can be changed into a prime (673762541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112293751 + ... + 112293756.

It is an arithmetic number, because the mean of its divisors is an integer number (224587508).

Almost surely, 2^673762521 is an apocalyptic number.

It is an amenable number.

673762521 is a deficient number, since it is larger than the sum of its proper divisors (224587511).

673762521 is a wasteful number, since it uses less digits than its factorization.

673762521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224587510.

The product of its digits is 105840, while the sum is 39.

The square root of 673762521 is about 25956.9358938993. The cubic root of 673762521 is about 876.6689327209.

The spelling of 673762521 in words is "six hundred seventy-three million, seven hundred sixty-two thousand, five hundred twenty-one".