9957209101 has 12 divisors (see below), whose sum is σ = 11642901852. Its totient is φ = 8490521088.

The previous prime is 9957209089. The next prime is 9957209113. The reversal of 9957209101 is 1019027599.

It is an interprime number because it is at equal distance from previous prime (9957209089) and next prime (9957209113).

It can be written as a sum of positive squares in 2 ways, for example, as 4008789225 + 5948419876 = 63315^2 + 77126^2 .

It is not a de Polignac number, because 9957209101 - 2⁷ = 9957208973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9957209161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 516990 + ... + 535903.

It is an arithmetic number, because the mean of its divisors is an integer number (970241821).

Almost surely, 2^9957209101 is an apocalyptic number.

It is an amenable number.

9957209101 is a deficient number, since it is larger than the sum of its proper divisors (1685692751).

9957209101 is a wasteful number, since it uses less digits than its factorization.

9957209101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053100 (or 1053093 counting only the distinct ones).

The product of its (nonzero) digits is 51030, while the sum is 43.

The square root of 9957209101 is about 99785.8161313521. The cubic root of 9957209101 is about 2151.3572897840.

The spelling of 9957209101 in words is "nine billion, nine hundred fifty-seven million, two hundred nine thousand, one hundred one".