142309169991 has 12 divisors (see below), whose sum is σ = 214494981168. Its totient is φ = 90747876384.

The previous prime is 142309169963. The next prime is 142309170043. The reversal of 142309169991 is 199961903241.

It is a happy number.

It is not a de Polignac number, because 142309169991 - 2⁹ = 142309169479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142309169291) 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, 343741750 + ... + 343742163.

It is an arithmetic number, because the mean of its divisors is an integer number (17874581764).

Almost surely, 2^142309169991 is an apocalyptic number.

142309169991 is a deficient number, since it is larger than the sum of its proper divisors (72185811177).

142309169991 is a wasteful number, since it uses less digits than its factorization.

142309169991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687483942 (or 687483939 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 54.

The spelling of 142309169991 in words is "one hundred forty-two billion, three hundred nine million, one hundred sixty-nine thousand, nine hundred ninety-one".