142977189 has 8 divisors (see below), whose sum is σ = 191036160. Its totient is φ = 95118176.

The previous prime is 142977179. The next prime is 142977203. The reversal of 142977189 is 981779241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142977189 - 2¹² = 142973093 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142977179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48312 + ... + 51185.

It is an arithmetic number, because the mean of its divisors is an integer number (23879520).

Almost surely, 2^142977189 is an apocalyptic number.

It is an amenable number.

142977189 is a deficient number, since it is larger than the sum of its proper divisors (48058971).

142977189 is an equidigital number, since it uses as much as digits as its factorization.

142977189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99979.

The product of its digits is 254016, while the sum is 48.

The square root of 142977189 is about 11957.3069292379. The cubic root of 142977189 is about 522.9043460901.

The spelling of 142977189 in words is "one hundred forty-two million, nine hundred seventy-seven thousand, one hundred eighty-nine".