142340623891 has 2 divisors, whose sum is σ = 142340623892. Its totient is φ = 142340623890.

The previous prime is 142340623829. The next prime is 142340623921. The reversal of 142340623891 is 198326043241.

It is a strong prime.

It is an emirp because it is prime and its reverse (198326043241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142340623891 - 2¹³ = 142340615699 is a prime.

It is a super-3 number, since 3×142340623891³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (142340623811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71170311945 + 71170311946.

It is an arithmetic number, because the mean of its divisors is an integer number (71170311946).

Almost surely, 2^142340623891 is an apocalyptic number.

142340623891 is a deficient number, since it is larger than the sum of its proper divisors (1).

142340623891 is an equidigital number, since it uses as much as digits as its factorization.

142340623891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 142340623891 in words is "one hundred forty-two billion, three hundred forty million, six hundred twenty-three thousand, eight hundred ninety-one".