142693549 has 2 divisors, whose sum is σ = 142693550. Its totient is φ = 142693548.

The previous prime is 142693519. The next prime is 142693559. The reversal of 142693549 is 945396241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140422500 + 2271049 = 11850^2 + 1507^2 .

It is a cyclic number.

It is not a de Polignac number, because 142693549 - 2²³ = 134304941 is a prime.

It is a super-2 number, since 2×142693549² = 40722897852430802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142693519) 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, 71346774 + 71346775.

It is an arithmetic number, because the mean of its divisors is an integer number (71346775).

Almost surely, 2^142693549 is an apocalyptic number.

It is an amenable number.

142693549 is a deficient number, since it is larger than the sum of its proper divisors (1).

142693549 is an equidigital number, since it uses as much as digits as its factorization.

142693549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 43.

The square root of 142693549 is about 11945.4405109230. The cubic root of 142693549 is about 522.5583357103.

The spelling of 142693549 in words is "one hundred forty-two million, six hundred ninety-three thousand, five hundred forty-nine".