142733909 has 4 divisors (see below), whose sum is σ = 150246240. Its totient is φ = 135221580.

The previous prime is 142733897. The next prime is 142733917. The reversal of 142733909 is 909337241.

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: 909337241 = 883 ⋅1029827.

It is a cyclic number.

It is not a de Polignac number, because 142733909 - 2⁴ = 142733893 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 (142733999) 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, 3756137 + ... + 3756174.

It is an arithmetic number, because the mean of its divisors is an integer number (37561560).

Almost surely, 2^142733909 is an apocalyptic number.

142733909 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

142733909 is a deficient number, since it is larger than the sum of its proper divisors (7512331).

142733909 is an equidigital number, since it uses as much as digits as its factorization.

142733909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7512330.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 142733909 is about 11947.1297389791. The cubic root of 142733909 is about 522.6075985453.

The spelling of 142733909 in words is "one hundred forty-two million, seven hundred thirty-three thousand, nine hundred nine".