704780389 has 2 divisors, whose sum is σ = 704780390. Its totient is φ = 704780388.

The previous prime is 704780387. The next prime is 704780411. The reversal of 704780389 is 983087407.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 633377889 + 71402500 = 25167^2 + 8450^2 .

It is a cyclic number.

It is not a de Polignac number, because 704780389 - 2¹ = 704780387 is a prime.

Together with 704780387, 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 (704780387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352390194 + 352390195.

It is an arithmetic number, because the mean of its divisors is an integer number (352390195).

Almost surely, 2^704780389 is an apocalyptic number.

It is an amenable number.

704780389 is a deficient number, since it is larger than the sum of its proper divisors (1).

704780389 is an equidigital number, since it uses as much as digits as its factorization.

704780389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 704780389 is about 26547.7002582145. The cubic root of 704780389 is about 889.9206212081.

The spelling of 704780389 in words is "seven hundred four million, seven hundred eighty thousand, three hundred eighty-nine".