672733397 has 12 divisors (see below), whose sum is σ = 783623916. Its totient is φ = 575850240.

The previous prime is 672733393. The next prime is 672733403. The reversal of 672733397 is 793337276.

It can be written as a sum of positive squares in 2 ways, for example, as 125126596 + 547606801 = 11186^2 + 23401^2 .

It is not a de Polignac number, because 672733397 - 2² = 672733393 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 (672733393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28997 + ... + 46757.

It is an arithmetic number, because the mean of its divisors is an integer number (65301993).

Almost surely, 2^672733397 is an apocalyptic number.

It is an amenable number.

672733397 is a deficient number, since it is larger than the sum of its proper divisors (110890519).

672733397 is a wasteful number, since it uses less digits than its factorization.

672733397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18548 (or 18541 counting only the distinct ones).

The product of its digits is 1000188, while the sum is 47.

The square root of 672733397 is about 25937.1046379506. The cubic root of 672733397 is about 876.2223556012. Note that the first 3 decimals are identical.

The spelling of 672733397 in words is "six hundred seventy-two million, seven hundred thirty-three thousand, three hundred ninety-seven".