704661421 has 2 divisors, whose sum is σ = 704661422. Its totient is φ = 704661420.

The previous prime is 704661329. The next prime is 704661427. The reversal of 704661421 is 124166407.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 630512100 + 74149321 = 25110^2 + 8611^2 .

It is an emirp because it is prime and its reverse (124166407) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 704661421 - 2²⁷ = 570443693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (704661427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352330710 + 352330711.

It is an arithmetic number, because the mean of its divisors is an integer number (352330711).

Almost surely, 2^704661421 is an apocalyptic number.

It is an amenable number.

704661421 is a deficient number, since it is larger than the sum of its proper divisors (1).

704661421 is an equidigital number, since it uses as much as digits as its factorization.

704661421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 704661421 is about 26545.4595175898. The cubic root of 704661421 is about 889.8705450729.

The spelling of 704661421 in words is "seven hundred four million, six hundred sixty-one thousand, four hundred twenty-one".