142199923 has 2 divisors, whose sum is σ = 142199924. Its totient is φ = 142199922.

The previous prime is 142199903. The next prime is 142199977. The reversal of 142199923 is 329991241.

It is a weak prime.

It is an emirp because it is prime and its reverse (329991241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142199923 - 2¹⁷ = 142068851 is a prime.

It is not a weakly prime, because it can be changed into another prime (142199903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71099961 + 71099962.

It is an arithmetic number, because the mean of its divisors is an integer number (71099962).

Almost surely, 2^142199923 is an apocalyptic number.

142199923 is a deficient number, since it is larger than the sum of its proper divisors (1).

142199923 is an equidigital number, since it uses as much as digits as its factorization.

142199923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 40.

The square root of 142199923 is about 11924.7609200353. The cubic root of 142199923 is about 521.9550699476.

It can be divided in two parts, 14219 and 9923, that added together give a palindrome (24142).

The spelling of 142199923 in words is "one hundred forty-two million, one hundred ninety-nine thousand, nine hundred twenty-three".