625264109 has 2 divisors, whose sum is σ = 625264110. Its totient is φ = 625264108.

The previous prime is 625264093. The next prime is 625264111. The reversal of 625264109 is 901462526.

It is a happy number.

625264109 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., 561216100 + 64048009 = 23690^2 + 8003^2 .

It is a cyclic number.

It is not a de Polignac number, because 625264109 - 2⁴ = 625264093 is a prime.

It is a super-3 number, since 3×625264109³ (a number of 27 digits) contains 333 as substring.

Together with 625264111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625263109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312632054 + 312632055.

It is an arithmetic number, because the mean of its divisors is an integer number (312632055).

Almost surely, 2^625264109 is an apocalyptic number.

It is an amenable number.

625264109 is a deficient number, since it is larger than the sum of its proper divisors (1).

625264109 is an equidigital number, since it uses as much as digits as its factorization.

625264109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 625264109 is about 25005.2816220894. The cubic root of 625264109 is about 855.1083883884.

The spelling of 625264109 in words is "six hundred twenty-five million, two hundred sixty-four thousand, one hundred nine".