672194993 has 6 divisors (see below), whose sum is σ = 674674902. Its totient is φ = 669724160.

The previous prime is 672194989. The next prime is 672195001. The reversal of 672194993 is 399491276.

It can be written as a sum of positive squares in 3 ways, for example, as 405297424 + 266897569 = 20132^2 + 16337^2 .

It is not a de Polignac number, because 672194993 - 2² = 672194989 is a prime.

It is a super-2 number, since 2×672194993² = 903692217228540098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672194923) 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 5 ways as a sum of consecutive naturals, for example, 74705 + ... + 83217.

It is an arithmetic number, because the mean of its divisors is an integer number (112445817).

Almost surely, 2^672194993 is an apocalyptic number.

It is an amenable number.

672194993 is a deficient number, since it is larger than the sum of its proper divisors (2479909).

672194993 is an frugal number, since it uses more digits than its factorization.

672194993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9075 (or 8794 counting only the distinct ones).

The product of its digits is 734832, while the sum is 50.

The square root of 672194993 is about 25926.7235299796. The cubic root of 672194993 is about 875.9885395837.

The spelling of 672194993 in words is "six hundred seventy-two million, one hundred ninety-four thousand, nine hundred ninety-three".