709381 has 2 divisors, whose sum is σ = 709382. Its totient is φ = 709380.

The previous prime is 709351. The next prime is 709409. The reversal of 709381 is 183907.

It is an a-pointer prime, because the next prime (709409) can be obtained adding 709381 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 312481 = 630^2 + 559^2 .

It is an emirp because it is prime and its reverse (183907) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 709381 - 2⁵ = 709349 is a prime.

It is a super-2 number, since 2×709381² = 1006442806322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (709321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 354690 + 354691.

It is an arithmetic number, because the mean of its divisors is an integer number (354691).

2⁷⁰⁹³⁸¹ is an apocalyptic number.

It is an amenable number.

709381 is a deficient number, since it is larger than the sum of its proper divisors (1).

709381 is an equidigital number, since it uses as much as digits as its factorization.

709381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 709381 is about 842.2475883017. The cubic root of 709381 is about 89.1852808064.

The spelling of 709381 in words is "seven hundred nine thousand, three hundred eighty-one".