706426621 has 4 divisors (see below), whose sum is σ = 716103772. Its totient is φ = 696749472.

The previous prime is 706426613. The next prime is 706426649. The reversal of 706426621 is 126624607.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126624607 = 19 ⋅6664453.

It can be written as a sum of positive squares in 2 ways, for example, as 204890596 + 501536025 = 14314^2 + 22395^2 .

It is a cyclic number.

It is not a de Polignac number, because 706426621 - 2³ = 706426613 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 (706426321) 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, 4838466 + ... + 4838611.

It is an arithmetic number, because the mean of its divisors is an integer number (179025943).

Almost surely, 2^706426621 is an apocalyptic number.

It is an amenable number.

706426621 is a deficient number, since it is larger than the sum of its proper divisors (9677151).

706426621 is an equidigital number, since it uses as much as digits as its factorization.

706426621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9677150.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 706426621 is about 26578.6873453149. The cubic root of 706426621 is about 890.6129771247.

The spelling of 706426621 in words is "seven hundred six million, four hundred twenty-six thousand, six hundred twenty-one".