142709923 has 4 divisors (see below), whose sum is σ = 143585608. Its totient is φ = 141834240.

The previous prime is 142709911. The next prime is 142709981. The reversal of 142709923 is 329907241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142709923 - 2⁵ = 142709891 is a prime.

It is a super-2 number, since 2×142709923² = 40732244245331858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142709123) 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, 437598 + ... + 437923.

It is an arithmetic number, because the mean of its divisors is an integer number (35896402).

Almost surely, 2^142709923 is an apocalyptic number.

142709923 is a deficient number, since it is larger than the sum of its proper divisors (875685).

142709923 is an equidigital number, since it uses as much as digits as its factorization.

142709923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875684.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 142709923 is about 11946.1258573648. The cubic root of 142709923 is about 522.5783226987.

The spelling of 142709923 in words is "one hundred forty-two million, seven hundred nine thousand, nine hundred twenty-three".