672391337 has 4 divisors (see below), whose sum is σ = 685078020. Its totient is φ = 659704656.

The previous prime is 672391331. The next prime is 672391381. The reversal of 672391337 is 733193276.

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 471063616 + 201327721 = 21704^2 + 14189^2 .

It is a cyclic number.

It is not a de Polignac number, because 672391337 - 2⁶ = 672391273 is a prime.

It is a super-2 number, since 2×672391337² = 904220220145295138, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 672391294 and 672391303.

It is not an unprimeable number, because it can be changed into a prime (672391331) 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, 6343262 + ... + 6343367.

It is an arithmetic number, because the mean of its divisors is an integer number (171269505).

Almost surely, 2^672391337 is an apocalyptic number.

It is an amenable number.

672391337 is a deficient number, since it is larger than the sum of its proper divisors (12686683).

672391337 is a wasteful number, since it uses less digits than its factorization.

672391337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12686682.

The product of its digits is 142884, while the sum is 41.

The square root of 672391337 is about 25930.5097713099. The cubic root of 672391337 is about 876.0738215590.

The spelling of 672391337 in words is "six hundred seventy-two million, three hundred ninety-one thousand, three hundred thirty-seven".