9661789253 has 2 divisors, whose sum is σ = 9661789254. Its totient is φ = 9661789252.

The previous prime is 9661789229. The next prime is 9661789259. The reversal of 9661789253 is 3529871669.

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., 7979312929 + 1682476324 = 89327^2 + 41018^2 .

It is a cyclic number.

It is not a de Polignac number, because 9661789253 - 2¹² = 9661785157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9661789259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4830894626 + 4830894627.

It is an arithmetic number, because the mean of its divisors is an integer number (4830894627).

Almost surely, 2^9661789253 is an apocalyptic number.

It is an amenable number.

9661789253 is a deficient number, since it is larger than the sum of its proper divisors (1).

9661789253 is an equidigital number, since it uses as much as digits as its factorization.

9661789253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 56.

The square root of 9661789253 is about 98294.4009239590. The cubic root of 9661789253 is about 2129.8671736402.

The spelling of 9661789253 in words is "nine billion, six hundred sixty-one million, seven hundred eighty-nine thousand, two hundred fifty-three".