707720161 has 2 divisors, whose sum is σ = 707720162. Its totient is φ = 707720160.

The previous prime is 707720099. The next prime is 707720177. The reversal of 707720161 is 161027707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 553190400 + 154529761 = 23520^2 + 12431^2 .

It is a cyclic number.

It is not a de Polignac number, because 707720161 - 2²³ = 699331553 is a prime.

It is not a weakly prime, because it can be changed into another prime (707720191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353860080 + 353860081.

It is an arithmetic number, because the mean of its divisors is an integer number (353860081).

Almost surely, 2^707720161 is an apocalyptic number.

It is an amenable number.

707720161 is a deficient number, since it is larger than the sum of its proper divisors (1).

707720161 is an equidigital number, since it uses as much as digits as its factorization.

707720161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4116, while the sum is 31.

The square root of 707720161 is about 26603.0103747677. The cubic root of 707720161 is about 891.1562470697.

Adding to 707720161 its reverse (161027707), we get a palindrome (868747868).

The spelling of 707720161 in words is "seven hundred seven million, seven hundred twenty thousand, one hundred sixty-one".