672270257 has 4 divisors (see below), whose sum is σ = 695452020. Its totient is φ = 649088496.

The previous prime is 672270251. The next prime is 672270323. The reversal of 672270257 is 752072276.

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 498003856 + 174266401 = 22316^2 + 13201^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672270257 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 672270257.

It is not an unprimeable number, because it can be changed into a prime (672270251) 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 3 ways as a sum of consecutive naturals, for example, 11590838 + ... + 11590895.

It is an arithmetic number, because the mean of its divisors is an integer number (173863005).

Almost surely, 2^672270257 is an apocalyptic number.

It is an amenable number.

672270257 is a deficient number, since it is larger than the sum of its proper divisors (23181763).

672270257 is a wasteful number, since it uses less digits than its factorization.

672270257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23181762.

The product of its (nonzero) digits is 82320, while the sum is 38.

The square root of 672270257 is about 25928.1749646982. The cubic root of 672270257 is about 876.0212324490.

The spelling of 672270257 in words is "six hundred seventy-two million, two hundred seventy thousand, two hundred fifty-seven".