142777977 has 4 divisors (see below), whose sum is σ = 190370640. Its totient is φ = 95185316.

The previous prime is 142777969. The next prime is 142777981. The reversal of 142777977 is 779777241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 779777241 = 3 ⋅259925747.

It is a cyclic number.

It is not a de Polignac number, because 142777977 - 2³ = 142777969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142777907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23796327 + ... + 23796332.

It is an arithmetic number, because the mean of its divisors is an integer number (47592660).

Almost surely, 2^142777977 is an apocalyptic number.

It is an amenable number.

142777977 is a deficient number, since it is larger than the sum of its proper divisors (47592663).

142777977 is an equidigital number, since it uses as much as digits as its factorization.

142777977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47592662.

The product of its digits is 1210104, while the sum is 51.

The square root of 142777977 is about 11948.9738889998. The cubic root of 142777977 is about 522.6613767075.

The spelling of 142777977 in words is "one hundred forty-two million, seven hundred seventy-seven thousand, nine hundred seventy-seven".