142877389 has 2 divisors, whose sum is σ = 142877390. Its totient is φ = 142877388.

The previous prime is 142877381. The next prime is 142877407. The reversal of 142877389 is 983778241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114169225 + 28708164 = 10685^2 + 5358^2 .

It is a cyclic number.

It is not a de Polignac number, because 142877389 - 2³ = 142877381 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142877381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71438694 + 71438695.

It is an arithmetic number, because the mean of its divisors is an integer number (71438695).

Almost surely, 2^142877389 is an apocalyptic number.

It is an amenable number.

142877389 is a deficient number, since it is larger than the sum of its proper divisors (1).

142877389 is an equidigital number, since it uses as much as digits as its factorization.

142877389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 49.

The square root of 142877389 is about 11953.1330202587. The cubic root of 142877389 is about 522.7826530169.

The spelling of 142877389 in words is "one hundred forty-two million, eight hundred seventy-seven thousand, three hundred eighty-nine".