705274249 has 3 divisors (see below), whose sum is σ = 705300807. Its totient is φ = 705247692.

The previous prime is 705274247. The next prime is 705274267. The reversal of 705274249 is 942472507.

The square root of 705274249 is 26557.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 942472507 = 1061 ⋅888287.

It can be written as a sum of positive squares in only one way, i.e., 318444025 + 386830224 = 17845^2 + 19668^2 .

It is not a de Polignac number, because 705274249 - 2¹ = 705274247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (705274247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 13279 + ... + 39835.

It is an arithmetic number, because the mean of its divisors is an integer number (235100269).

Almost surely, 2^705274249 is an apocalyptic number.

705274249 is the 26557-th square number.

705274249 is the 13279-th centered octagonal number.

It is an amenable number.

705274249 is a deficient number, since it is larger than the sum of its proper divisors (26558).

705274249 is an frugal number, since it uses more digits than its factorization.

705274249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53114 (or 26557 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The cubic root of 705274249 is about 890.1284370464.

The spelling of 705274249 in words is "seven hundred five million, two hundred seventy-four thousand, two hundred forty-nine".