142198493 has 2 divisors, whose sum is σ = 142198494. Its totient is φ = 142198492.

The previous prime is 142198481. The next prime is 142198501. The reversal of 142198493 is 394891241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85618009 + 56580484 = 9253^2 + 7522^2 .

It is an emirp because it is prime and its reverse (394891241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142198493 - 2¹² = 142194397 is a prime.

It is a super-2 number, since 2×142198493² = 40440822822942098, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 142198493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142198423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71099246 + 71099247.

It is an arithmetic number, because the mean of its divisors is an integer number (71099247).

Almost surely, 2^142198493 is an apocalyptic number.

It is an amenable number.

142198493 is a deficient number, since it is larger than the sum of its proper divisors (1).

142198493 is an equidigital number, since it uses as much as digits as its factorization.

142198493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 41.

The square root of 142198493 is about 11924.7009606111. The cubic root of 142198493 is about 521.9533203024.

The spelling of 142198493 in words is "one hundred forty-two million, one hundred ninety-eight thousand, four hundred ninety-three".