142790389 has 4 divisors (see below), whose sum is σ = 163189024. Its totient is φ = 122391756.

The previous prime is 142790383. The next prime is 142790399. The reversal of 142790389 is 983097241.

142790389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 142790389 - 2¹³ = 142782197 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 (142790383) 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, 10199307 + ... + 10199320.

It is an arithmetic number, because the mean of its divisors is an integer number (40797256).

Almost surely, 2^142790389 is an apocalyptic number.

It is an amenable number.

142790389 is a deficient number, since it is larger than the sum of its proper divisors (20398635).

142790389 is an equidigital number, since it uses as much as digits as its factorization.

142790389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20398634.

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

The square root of 142790389 is about 11949.4932528539. The cubic root of 142790389 is about 522.6765216320.

The spelling of 142790389 in words is "one hundred forty-two million, seven hundred ninety thousand, three hundred eighty-nine".