1707420661 has 2 divisors, whose sum is σ = 1707420662. Its totient is φ = 1707420660.

The previous prime is 1707420641. The next prime is 1707420667. The reversal of 1707420661 is 1660247071.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1549918161 + 157502500 = 39369^2 + 12550^2 .

It is a cyclic number.

It is not a de Polignac number, because 1707420661 - 2⁵ = 1707420629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1707420667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 853710330 + 853710331.

It is an arithmetic number, because the mean of its divisors is an integer number (853710331).

Almost surely, 2^1707420661 is an apocalyptic number.

It is an amenable number.

1707420661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1707420661 is an equidigital number, since it uses as much as digits as its factorization.

1707420661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 1707420661 is about 41320.9470002806. The cubic root of 1707420661 is about 1195.2172270145.

The spelling of 1707420661 in words is "one billion, seven hundred seven million, four hundred twenty thousand, six hundred sixty-one".