705830437681 has 2 divisors, whose sum is σ = 705830437682. Its totient is φ = 705830437680.

The previous prime is 705830437673. The next prime is 705830437759. The reversal of 705830437681 is 186734038507.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 531027008656 + 174803429025 = 728716^2 + 418095^2 .

It is an emirp because it is prime and its reverse (186734038507) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 705830437681 - 2³ = 705830437673 is a prime.

It is a super-2 number, since 2×705830437681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (705830437601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352915218840 + 352915218841.

It is an arithmetic number, because the mean of its divisors is an integer number (352915218841).

Almost surely, 2^705830437681 is an apocalyptic number.

It is an amenable number.

705830437681 is a deficient number, since it is larger than the sum of its proper divisors (1).

705830437681 is an equidigital number, since it uses as much as digits as its factorization.

705830437681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 705830437681 in words is "seven hundred five billion, eight hundred thirty million, four hundred thirty-seven thousand, six hundred eighty-one".