142772689 has 2 divisors, whose sum is σ = 142772690. Its totient is φ = 142772688.

The previous prime is 142772687. The next prime is 142772717. The reversal of 142772689 is 986277241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82446400 + 60326289 = 9080^2 + 7767^2 .

It is a cyclic number.

It is not a de Polignac number, because 142772689 - 2¹ = 142772687 is a prime.

Together with 142772687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (142772687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71386344 + 71386345.

It is an arithmetic number, because the mean of its divisors is an integer number (71386345).

Almost surely, 2^142772689 is an apocalyptic number.

It is an amenable number.

142772689 is a deficient number, since it is larger than the sum of its proper divisors (1).

142772689 is an equidigital number, since it uses as much as digits as its factorization.

142772689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 46.

The square root of 142772689 is about 11948.7526127207. The cubic root of 142772689 is about 522.6549241076.

The spelling of 142772689 in words is "one hundred forty-two million, seven hundred seventy-two thousand, six hundred eighty-nine".