142889948479 has 4 divisors (see below), whose sum is σ = 151295239584. Its totient is φ = 134484657376.

The previous prime is 142889948437. The next prime is 142889948489. The reversal of 142889948479 is 974849988241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142889948479 - 2⁷ = 142889948351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142889948489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4202645527 + ... + 4202645560.

It is an arithmetic number, because the mean of its divisors is an integer number (37823809896).

Almost surely, 2^142889948479 is an apocalyptic number.

142889948479 is a deficient number, since it is larger than the sum of its proper divisors (8405291105).

142889948479 is an equidigital number, since it uses as much as digits as its factorization.

142889948479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8405291104.

The product of its digits is 334430208, while the sum is 73.

The spelling of 142889948479 in words is "one hundred forty-two billion, eight hundred eighty-nine million, nine hundred forty-eight thousand, four hundred seventy-nine".