9961437253 has 2 divisors, whose sum is σ = 9961437254. Its totient is φ = 9961437252.

The previous prime is 9961437217. The next prime is 9961437301. The reversal of 9961437253 is 3527341699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9961437249 + 4 = 99807^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 9961437253 - 2¹³ = 9961429061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9961437197 and 9961437206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9961431253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4980718626 + 4980718627.

It is an arithmetic number, because the mean of its divisors is an integer number (4980718627).

Almost surely, 2^9961437253 is an apocalyptic number.

It is an amenable number.

9961437253 is a deficient number, since it is larger than the sum of its proper divisors (1).

9961437253 is an equidigital number, since it uses as much as digits as its factorization.

9961437253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 49.

The square root of 9961437253 is about 99807.0000200387. Note that the first 4 decimals coincide. The cubic root of 9961437253 is about 2151.6617585803.

The spelling of 9961437253 in words is "nine billion, nine hundred sixty-one million, four hundred thirty-seven thousand, two hundred fifty-three".