142879993 has 4 divisors (see below), whose sum is σ = 143449488. Its totient is φ = 142310500.

The previous prime is 142879987. The next prime is 142880009. The reversal of 142879993 is 399978241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142879993 - 2⁹ = 142879481 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142879993.

It is not an unprimeable number, because it can be changed into a prime (142879393) 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, 284371 + ... + 284872.

It is an arithmetic number, because the mean of its divisors is an integer number (35862372).

Almost surely, 2^142879993 is an apocalyptic number.

It is an amenable number.

142879993 is a deficient number, since it is larger than the sum of its proper divisors (569495).

142879993 is an equidigital number, since it uses as much as digits as its factorization.

142879993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569494.

The product of its digits is 979776, while the sum is 52.

The square root of 142879993 is about 11953.2419451796. The cubic root of 142879993 is about 522.7858289749.

The spelling of 142879993 in words is "one hundred forty-two million, eight hundred seventy-nine thousand, nine hundred ninety-three".