861453349 has 2 divisors, whose sum is σ = 861453350. Its totient is φ = 861453348.

The previous prime is 861453347. The next prime is 861453379. The reversal of 861453349 is 943354168.

861453349 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., 755260324 + 106193025 = 27482^2 + 10305^2 .

It is a cyclic number.

It is not a de Polignac number, because 861453349 - 2¹ = 861453347 is a prime.

Together with 861453347, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861453347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430726674 + 430726675.

It is an arithmetic number, because the mean of its divisors is an integer number (430726675).

Almost surely, 2^861453349 is an apocalyptic number.

It is an amenable number.

861453349 is a deficient number, since it is larger than the sum of its proper divisors (1).

861453349 is an equidigital number, since it uses as much as digits as its factorization.

861453349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 43.

The square root of 861453349 is about 29350.5255319219. The cubic root of 861453349 is about 951.5039333055.

The spelling of 861453349 in words is "eight hundred sixty-one million, four hundred fifty-three thousand, three hundred forty-nine".