991342697942 has 8 divisors (see below), whose sum is σ = 1487492349600. Its totient is φ = 495511914744.

The previous prime is 991342697833. The next prime is 991342698053. The reversal of 991342697942 is 249796243199.

991342697942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79709342 + ... + 79721777.

It is an arithmetic number, because the mean of its divisors is an integer number (185936543700).

Almost surely, 2^991342697942 is an apocalyptic number.

991342697942 is a deficient number, since it is larger than the sum of its proper divisors (496149651658).

991342697942 is a wasteful number, since it uses less digits than its factorization.

991342697942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159434230.

The product of its digits is 52907904, while the sum is 65.

The spelling of 991342697942 in words is "nine hundred ninety-one billion, three hundred forty-two million, six hundred ninety-seven thousand, nine hundred forty-two".