142109677 has 2 divisors, whose sum is σ = 142109678. Its totient is φ = 142109676.

The previous prime is 142109651. The next prime is 142109699. The reversal of 142109677 is 776901241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140635881 + 1473796 = 11859^2 + 1214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142109677 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 (142109777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71054838 + 71054839.

It is an arithmetic number, because the mean of its divisors is an integer number (71054839).

Almost surely, 2^142109677 is an apocalyptic number.

It is an amenable number.

142109677 is a deficient number, since it is larger than the sum of its proper divisors (1).

142109677 is an equidigital number, since it uses as much as digits as its factorization.

142109677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 142109677 is about 11920.9763442429. The cubic root of 142109677 is about 521.8446284308.

The spelling of 142109677 in words is "one hundred forty-two million, one hundred nine thousand, six hundred seventy-seven".