9702403661 has 2 divisors, whose sum is σ = 9702403662. Its totient is φ = 9702403660.

The previous prime is 9702403657. The next prime is 9702403681. The reversal of 9702403661 is 1663042079.

9702403661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7707084100 + 1995319561 = 87790^2 + 44669^2 .

It is an emirp because it is prime and its reverse (1663042079) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9702403661 - 2² = 9702403657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9702403681) 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, 4851201830 + 4851201831.

It is an arithmetic number, because the mean of its divisors is an integer number (4851201831).

Almost surely, 2^9702403661 is an apocalyptic number.

It is an amenable number.

9702403661 is a deficient number, since it is larger than the sum of its proper divisors (1).

9702403661 is an equidigital number, since it uses as much as digits as its factorization.

9702403661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 9702403661 is about 98500.7800019878. The cubic root of 9702403661 is about 2132.8473796745.

The spelling of 9702403661 in words is "nine billion, seven hundred two million, four hundred three thousand, six hundred sixty-one".