623166157 has 2 divisors, whose sum is σ = 623166158. Its totient is φ = 623166156.

The previous prime is 623166149. The next prime is 623166223. The reversal of 623166157 is 751661326.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 529966441 + 93199716 = 23021^2 + 9654^2 .

It is a cyclic number.

It is not a de Polignac number, because 623166157 - 2³ = 623166149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623161157) 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, 311583078 + 311583079.

It is an arithmetic number, because the mean of its divisors is an integer number (311583079).

Almost surely, 2^623166157 is an apocalyptic number.

It is an amenable number.

623166157 is a deficient number, since it is larger than the sum of its proper divisors (1).

623166157 is an equidigital number, since it uses as much as digits as its factorization.

623166157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 37.

The square root of 623166157 is about 24963.2961966163. The cubic root of 623166157 is about 854.1509334920.

The spelling of 623166157 in words is "six hundred twenty-three million, one hundred sixty-six thousand, one hundred fifty-seven".