672428849 has 2 divisors, whose sum is σ = 672428850. Its totient is φ = 672428848.

The previous prime is 672428839. The next prime is 672428873. The reversal of 672428849 is 948824276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 663989824 + 8439025 = 25768^2 + 2905^2 .

It is a cyclic number.

It is not a de Polignac number, because 672428849 - 2⁴ = 672428833 is a prime.

It is a super-3 number, since 3×672428849³ (a number of 27 digits) contains 333 as substring.

It is equal to p_34897739 and since 672428849 and 34897739 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 672428797 and 672428806.

It is not a weakly prime, because it can be changed into another prime (672428839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336214424 + 336214425.

It is an arithmetic number, because the mean of its divisors is an integer number (336214425).

Almost surely, 2^672428849 is an apocalyptic number.

It is an amenable number.

672428849 is a deficient number, since it is larger than the sum of its proper divisors (1).

672428849 is an equidigital number, since it uses as much as digits as its factorization.

672428849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1548288, while the sum is 50.

The square root of 672428849 is about 25931.2330790497. The cubic root of 672428849 is about 876.0901129994.

The spelling of 672428849 in words is "six hundred seventy-two million, four hundred twenty-eight thousand, eight hundred forty-nine".