625436549 has 2 divisors, whose sum is σ = 625436550. Its totient is φ = 625436548.

The previous prime is 625436489. The next prime is 625436557. The reversal of 625436549 is 945634526.

625436549 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., 429940225 + 195496324 = 20735^2 + 13982^2 .

It is a cyclic number.

It is not a de Polignac number, because 625436549 - 2¹⁶ = 625371013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625436249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312718274 + 312718275.

It is an arithmetic number, because the mean of its divisors is an integer number (312718275).

Almost surely, 2^625436549 is an apocalyptic number.

It is an amenable number.

625436549 is a deficient number, since it is larger than the sum of its proper divisors (1).

625436549 is an equidigital number, since it uses as much as digits as its factorization.

625436549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 44.

The square root of 625436549 is about 25008.7294559320. The cubic root of 625436549 is about 855.1869905530.

The spelling of 625436549 in words is "six hundred twenty-five million, four hundred thirty-six thousand, five hundred forty-nine".