999999940497 has 8 divisors (see below), whose sum is σ = 1333427960256. Its totient is φ = 666619273872.

The previous prime is 999999940483. The next prime is 999999940517. The reversal of 999999940497 is 794049999999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 999999940497 - 2¹⁰ = 999999939473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999999940427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11788978 + ... + 11873499.

It is an arithmetic number, because the mean of its divisors is an integer number (166678495032).

Almost surely, 2^999999940497 is an apocalyptic number.

It is an amenable number.

999999940497 is a deficient number, since it is larger than the sum of its proper divisors (333428019759).

999999940497 is a wasteful number, since it uses less digits than its factorization.

999999940497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23676567.

The product of its (nonzero) digits is 4821232752, while the sum is 87.

The spelling of 999999940497 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred forty thousand, four hundred ninety-seven".