142023443449 has 4 divisors (see below), whose sum is σ = 143402311936. Its totient is φ = 140644574964.

The previous prime is 142023443389. The next prime is 142023443461. The reversal of 142023443449 is 944344320241.

It is a happy number.

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: 944344320241 = 7 ⋅134906331463.

It is a cyclic number.

It is not a de Polignac number, because 142023443449 - 2¹¹ = 142023441401 is a prime.

It is a super-2 number, since 2×142023443449² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142023444449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689434089 + ... + 689434294.

It is an arithmetic number, because the mean of its divisors is an integer number (35850577984).

Almost surely, 2^142023443449 is an apocalyptic number.

It is an amenable number.

142023443449 is a deficient number, since it is larger than the sum of its proper divisors (1378868487).

142023443449 is a wasteful number, since it uses less digits than its factorization.

142023443449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378868486.

The product of its (nonzero) digits is 331776, while the sum is 40.

The spelling of 142023443449 in words is "one hundred forty-two billion, twenty-three million, four hundred forty-three thousand, four hundred forty-nine".