706621549 has 2 divisors, whose sum is σ = 706621550. Its totient is φ = 706621548.

The previous prime is 706621519. The next prime is 706621631. The reversal of 706621549 is 945126607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 694322500 + 12299049 = 26350^2 + 3507^2 .

It is a cyclic number.

It is not a de Polignac number, because 706621549 - 2¹⁵ = 706588781 is a prime.

It is a super-2 number, since 2×706621549² = 998628027022318802, 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 (706621519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353310774 + 353310775.

It is an arithmetic number, because the mean of its divisors is an integer number (353310775).

Almost surely, 2^706621549 is an apocalyptic number.

It is an amenable number.

706621549 is a deficient number, since it is larger than the sum of its proper divisors (1).

706621549 is an equidigital number, since it uses as much as digits as its factorization.

706621549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 706621549 is about 26582.3540906369. The cubic root of 706621549 is about 890.6948867601.

The spelling of 706621549 in words is "seven hundred six million, six hundred twenty-one thousand, five hundred forty-nine".