9999997406231 has 12 divisors (see below), whose sum is σ = 12316923577008. Its totient is φ = 8067224797632.

The previous prime is 9999997406207. The next prime is 9999997406251. The reversal of 9999997406231 is 1326047999999.

It is not a de Polignac number, because 9999997406231 - 2¹⁸ = 9999997144087 is a prime.

It is a super-3 number, since 3×9999997406231³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999997406251) 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, 6002398571 + ... + 6002400236.

It is an arithmetic number, because the mean of its divisors is an integer number (1026410298084).

Almost surely, 2^{9999997406231} is an apocalyptic number.

9999997406231 is a deficient number, since it is larger than the sum of its proper divisors (2316926170777).

9999997406231 is a wasteful number, since it uses less digits than its factorization.

9999997406231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12004798838 (or 12004798831 counting only the distinct ones).

The product of its (nonzero) digits is 535692528, while the sum is 77.

The spelling of 9999997406231 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred ninety-seven million, four hundred six thousand, two hundred thirty-one".