626061749 has 2 divisors, whose sum is σ = 626061750. Its totient is φ = 626061748.

The previous prime is 626061743. The next prime is 626061757. The reversal of 626061749 is 947160626.

626061749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 595701649 + 30360100 = 24407^2 + 5510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-626061749 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 (626061743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313030874 + 313030875.

It is an arithmetic number, because the mean of its divisors is an integer number (313030875).

Almost surely, 2^626061749 is an apocalyptic number.

It is an amenable number.

626061749 is a deficient number, since it is larger than the sum of its proper divisors (1).

626061749 is an equidigital number, since it uses as much as digits as its factorization.

626061749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 626061749 is about 25021.2259691647. The cubic root of 626061749 is about 855.4718501723.

The spelling of 626061749 in words is "six hundred twenty-six million, sixty-one thousand, seven hundred forty-nine".