142977923 has 8 divisors (see below), whose sum is σ = 157521456. Its totient is φ = 128692000.

The previous prime is 142977911. The next prime is 142977931. The reversal of 142977923 is 329779241.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142977923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142977943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63236 + ... + 65457.

It is an arithmetic number, because the mean of its divisors is an integer number (19690182).

Almost surely, 2^142977923 is an apocalyptic number.

142977923 is a deficient number, since it is larger than the sum of its proper divisors (14543533).

142977923 is a wasteful number, since it uses less digits than its factorization.

142977923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128805.

The product of its digits is 190512, while the sum is 44.

The square root of 142977923 is about 11957.3376217283. The cubic root of 142977923 is about 522.9052408975.

It can be divided in two parts, 1 and 42977923, that added together give a palindrome (42977924).

The spelling of 142977923 in words is "one hundred forty-two million, nine hundred seventy-seven thousand, nine hundred twenty-three".