707561 has 2 divisors, whose sum is σ = 707562. Its totient is φ = 707560.

The previous prime is 707543. The next prime is 707563. The reversal of 707561 is 165707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 648025 + 59536 = 805^2 + 244^2 .

It is an emirp because it is prime and its reverse (165707) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-707561 is a prime.

Together with 707563, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 707561.

It is not a weakly prime, because it can be changed into another prime (707563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353780 + 353781.

It is an arithmetic number, because the mean of its divisors is an integer number (353781).

2⁷⁰⁷⁵⁶¹ is an apocalyptic number.

It is an amenable number.

707561 is a deficient number, since it is larger than the sum of its proper divisors (1).

707561 is an equidigital number, since it uses as much as digits as its factorization.

707561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 707561 is about 841.1664520177. The cubic root of 707561 is about 89.1089437257.

The spelling of 707561 in words is "seven hundred seven thousand, five hundred sixty-one".