704023156421 has 4 divisors (see below), whose sum is σ = 758178783852. Its totient is φ = 649867528992.

The previous prime is 704023156411. The next prime is 704023156427. The reversal of 704023156421 is 124651320407.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 453608985025 + 250414171396 = 673505^2 + 500414^2 .

It is a cyclic number.

It is not a de Polignac number, because 704023156421 - 2³⁰ = 702949414597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (704023156427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27077813696 + ... + 27077813721.

It is an arithmetic number, because the mean of its divisors is an integer number (189544695963).

Almost surely, 2^704023156421 is an apocalyptic number.

It is an amenable number.

704023156421 is a deficient number, since it is larger than the sum of its proper divisors (54155627431).

704023156421 is a wasteful number, since it uses less digits than its factorization.

704023156421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54155627430.

The product of its (nonzero) digits is 40320, while the sum is 35.

Adding to 704023156421 its reverse (124651320407), we get a palindrome (828674476828).

The spelling of 704023156421 in words is "seven hundred four billion, twenty-three million, one hundred fifty-six thousand, four hundred twenty-one".