673632569 has 2 divisors, whose sum is σ = 673632570. Its totient is φ = 673632568.

The previous prime is 673632439. The next prime is 673632581. The reversal of 673632569 is 965236376.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 526932025 + 146700544 = 22955^2 + 12112^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-673632569 is a prime.

It is a super-2 number, since 2×673632569² = 907561676035079522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (673632269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336816284 + 336816285.

It is an arithmetic number, because the mean of its divisors is an integer number (336816285).

Almost surely, 2^673632569 is an apocalyptic number.

It is an amenable number.

673632569 is a deficient number, since it is larger than the sum of its proper divisors (1).

673632569 is an equidigital number, since it uses as much as digits as its factorization.

673632569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 47.

The square root of 673632569 is about 25954.4325501445. The cubic root of 673632569 is about 876.6125665668.

The spelling of 673632569 in words is "six hundred seventy-three million, six hundred thirty-two thousand, five hundred sixty-nine".