9901691053 has 2 divisors, whose sum is σ = 9901691054. Its totient is φ = 9901691052.

The previous prime is 9901691047. The next prime is 9901691057. The reversal of 9901691053 is 3501961099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9749982564 + 151708489 = 98742^2 + 12317^2 .

It is a cyclic number.

It is not a de Polignac number, because 9901691053 - 2⁹ = 9901690541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9901691057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4950845526 + 4950845527.

It is an arithmetic number, because the mean of its divisors is an integer number (4950845527).

Almost surely, 2^9901691053 is an apocalyptic number.

It is an amenable number.

9901691053 is a deficient number, since it is larger than the sum of its proper divisors (1).

9901691053 is an equidigital number, since it uses as much as digits as its factorization.

9901691053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65610, while the sum is 43.

The square root of 9901691053 is about 99507.2412088688. The cubic root of 9901691053 is about 2147.3514205880.

The spelling of 9901691053 in words is "nine billion, nine hundred one million, six hundred ninety-one thousand, fifty-three".