142890793 has 4 divisors (see below), whose sum is σ = 143434368. Its totient is φ = 142347220.

The previous prime is 142890791. The next prime is 142890821. The reversal of 142890793 is 397098241.

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, and also an emirpimes, since its reverse is a distinct semiprime: 397098241 = 281 ⋅1413161.

It is a cyclic number.

It is not a de Polignac number, because 142890793 - 2¹ = 142890791 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142890791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271393 + ... + 271918.

It is an arithmetic number, because the mean of its divisors is an integer number (35858592).

Almost surely, 2^142890793 is an apocalyptic number.

It is an amenable number.

142890793 is a deficient number, since it is larger than the sum of its proper divisors (543575).

142890793 is an equidigital number, since it uses as much as digits as its factorization.

142890793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543574.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 142890793 is about 11953.6936969290. The cubic root of 142890793 is about 522.7990007390.

The spelling of 142890793 in words is "one hundred forty-two million, eight hundred ninety thousand, seven hundred ninety-three".