142979693 has 4 divisors (see below), whose sum is σ = 150504960. Its totient is φ = 135454428.

The previous prime is 142979677. The next prime is 142979723. The reversal of 142979693 is 396979241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 396979241 = 23 ⋅17259967.

It is a cyclic number.

It is not a de Polignac number, because 142979693 - 2⁴ = 142979677 is a prime.

It is a super-2 number, since 2×142979693² = 40886385220748498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142979633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3762605 + ... + 3762642.

It is an arithmetic number, because the mean of its divisors is an integer number (37626240).

Almost surely, 2^142979693 is an apocalyptic number.

It is an amenable number.

142979693 is a deficient number, since it is larger than the sum of its proper divisors (7525267).

142979693 is an equidigital number, since it uses as much as digits as its factorization.

142979693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7525266.

The product of its digits is 734832, while the sum is 50.

The square root of 142979693 is about 11957.4116346306. The cubic root of 142979693 is about 522.9073986629.

The spelling of 142979693 in words is "one hundred forty-two million, nine hundred seventy-nine thousand, six hundred ninety-three".