672424993 has 4 divisors (see below), whose sum is σ = 679980420. Its totient is φ = 664869568.

The previous prime is 672424967. The next prime is 672425023. The reversal of 672424993 is 399424276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 295599249 + 376825744 = 17193^2 + 19412^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672424993 is a prime.

It is a super-2 number, since 2×672424993² = 904310742422100098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672424903) 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, 3777580 + ... + 3777757.

It is an arithmetic number, because the mean of its divisors is an integer number (169995105).

Almost surely, 2^672424993 is an apocalyptic number.

It is an amenable number.

672424993 is a deficient number, since it is larger than the sum of its proper divisors (7555427).

672424993 is an equidigital number, since it uses as much as digits as its factorization.

672424993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7555426.

The product of its digits is 653184, while the sum is 46.

The square root of 672424993 is about 25931.1587284487. The cubic root of 672424993 is about 876.0884383687.

The spelling of 672424993 in words is "six hundred seventy-two million, four hundred twenty-four thousand, nine hundred ninety-three".