626433161 has 2 divisors, whose sum is σ = 626433162. Its totient is φ = 626433160.

The previous prime is 626433139. The next prime is 626433163. The reversal of 626433161 is 161334626.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 439153936 + 187279225 = 20956^2 + 13685^2 .

It is a cyclic number.

It is not a de Polignac number, because 626433161 - 2¹⁰ = 626432137 is a prime.

Together with 626433163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (626433163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313216580 + 313216581.

It is an arithmetic number, because the mean of its divisors is an integer number (313216581).

Almost surely, 2^626433161 is an apocalyptic number.

It is an amenable number.

626433161 is a deficient number, since it is larger than the sum of its proper divisors (1).

626433161 is an equidigital number, since it uses as much as digits as its factorization.

626433161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 32.

The square root of 626433161 is about 25028.6468072087. The cubic root of 626433161 is about 855.6409866834.

Adding to 626433161 its reverse (161334626), we get a palindrome (787767787).

The spelling of 626433161 in words is "six hundred twenty-six million, four hundred thirty-three thousand, one hundred sixty-one".