1672276729 has 2 divisors, whose sum is σ = 1672276730. Its totient is φ = 1672276728.

The previous prime is 1672276721. The next prime is 1672276747. The reversal of 1672276729 is 9276722761.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1545669225 + 126607504 = 39315^2 + 11252^2 .

It is a cyclic number.

It is not a de Polignac number, because 1672276729 - 2³ = 1672276721 is a prime.

It is not a weakly prime, because it can be changed into another prime (1672276721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836138364 + 836138365.

It is an arithmetic number, because the mean of its divisors is an integer number (836138365).

Almost surely, 2^1672276729 is an apocalyptic number.

It is an amenable number.

1672276729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1672276729 is an equidigital number, since it uses as much as digits as its factorization.

1672276729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 889056, while the sum is 49.

The square root of 1672276729 is about 40893.4802749778. The cubic root of 1672276729 is about 1186.9599045532.

The spelling of 1672276729 in words is "one billion, six hundred seventy-two million, two hundred seventy-six thousand, seven hundred twenty-nine".