142906823 has 4 divisors (see below), whose sum is σ = 143733048. Its totient is φ = 142080600.

The previous prime is 142906801. The next prime is 142906831. The reversal of 142906823 is 328609241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 328609241 = 4691 ⋅70051.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142906823 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 (142906223) 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, 412853 + ... + 413198.

It is an arithmetic number, because the mean of its divisors is an integer number (35933262).

Almost surely, 2^142906823 is an apocalyptic number.

142906823 is a deficient number, since it is larger than the sum of its proper divisors (826225).

142906823 is an equidigital number, since it uses as much as digits as its factorization.

142906823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826224.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 142906823 is about 11954.3641821721. The cubic root of 142906823 is about 522.8185498283.

The spelling of 142906823 in words is "one hundred forty-two million, nine hundred six thousand, eight hundred twenty-three".