626140897 has 2 divisors, whose sum is σ = 626140898. Its totient is φ = 626140896.

The previous prime is 626140873. The next prime is 626140901. The reversal of 626140897 is 798041626.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 316697616 + 309443281 = 17796^2 + 17591^2 .

It is a cyclic number.

It is not a de Polignac number, because 626140897 - 2¹⁵ = 626108129 is a prime.

It is not a weakly prime, because it can be changed into another prime (626140817) 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, 313070448 + 313070449.

It is an arithmetic number, because the mean of its divisors is an integer number (313070449).

Almost surely, 2^626140897 is an apocalyptic number.

It is an amenable number.

626140897 is a deficient number, since it is larger than the sum of its proper divisors (1).

626140897 is an equidigital number, since it uses as much as digits as its factorization.

626140897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 626140897 is about 25022.8075363257. The cubic root of 626140897 is about 855.5078988172.

The spelling of 626140897 in words is "six hundred twenty-six million, one hundred forty thousand, eight hundred ninety-seven".