673156553 has 2 divisors, whose sum is σ = 673156554. Its totient is φ = 673156552.

The previous prime is 673156543. The next prime is 673156559. The reversal of 673156553 is 355651376.

673156553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 521300224 + 151856329 = 22832^2 + 12323^2 .

It is a cyclic number.

It is not a de Polignac number, because 673156553 - 2¹² = 673152457 is a prime.

It is equal to p_34933784 and since 673156553 and 34933784 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 673156553.

It is not a weakly prime, because it can be changed into another prime (673156559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336578276 + 336578277.

It is an arithmetic number, because the mean of its divisors is an integer number (336578277).

Almost surely, 2^673156553 is an apocalyptic number.

It is an amenable number.

673156553 is a deficient number, since it is larger than the sum of its proper divisors (1).

673156553 is an equidigital number, since it uses as much as digits as its factorization.

673156553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 283500, while the sum is 41.

The square root of 673156553 is about 25945.2607040284. The cubic root of 673156553 is about 876.4060346211.

The spelling of 673156553 in words is "six hundred seventy-three million, one hundred fifty-six thousand, five hundred fifty-three".