142637669 has 2 divisors, whose sum is σ = 142637670. Its totient is φ = 142637668.

The previous prime is 142637659. The next prime is 142637683. The reversal of 142637669 is 966736241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95550625 + 47087044 = 9775^2 + 6862^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142637669 is a prime.

It is a super-2 number, since 2×142637669² = 40691009235507122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142637629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71318834 + 71318835.

It is an arithmetic number, because the mean of its divisors is an integer number (71318835).

Almost surely, 2^142637669 is an apocalyptic number.

It is an amenable number.

142637669 is a deficient number, since it is larger than the sum of its proper divisors (1).

142637669 is an equidigital number, since it uses as much as digits as its factorization.

142637669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 44.

The square root of 142637669 is about 11943.1013141478. The cubic root of 142637669 is about 522.4901140503.

The spelling of 142637669 in words is "one hundred forty-two million, six hundred thirty-seven thousand, six hundred sixty-nine".