9997909407 has 32 divisors (see below), whose sum is σ = 15054681600. Its totient is φ = 6556771584.

The previous prime is 9997909391. The next prime is 9997909451. The reversal of 9997909407 is 7049097999.

9997909407 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9997909407 - 2⁴ = 9997909391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9997909477) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 425944 + ... + 448802.

It is an arithmetic number, because the mean of its divisors is an integer number (470458800).

Almost surely, 2^9997909407 is an apocalyptic number.

9997909407 is a gapful number since it is divisible by the number (97) formed by its first and last digit.

9997909407 is a deficient number, since it is larger than the sum of its proper divisors (5056772193).

9997909407 is a wasteful number, since it uses less digits than its factorization.

9997909407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23132 (or 23126 counting only the distinct ones).

The product of its (nonzero) digits is 11573604, while the sum is 63.

The square root of 9997909407 is about 99989.5464886205. The cubic root of 9997909407 is about 2154.2845446989.

The spelling of 9997909407 in words is "nine billion, nine hundred ninety-seven million, nine hundred nine thousand, four hundred seven".