143920597421 has 4 divisors (see below), whose sum is σ = 143937346812. Its totient is φ = 143903848032.

The previous prime is 143920597399. The next prime is 143920597423. The reversal of 143920597421 is 124795029341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124795029341 = 19 ⋅6568159439.

It can be written as a sum of positive squares in 2 ways, for example, as 50566516900 + 93354080521 = 224870^2 + 305539^2 .

It is a cyclic number.

It is not a de Polignac number, because 143920597421 - 2¹⁰ = 143920596397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143920597423) 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, 8361800 + ... + 8378993.

It is an arithmetic number, because the mean of its divisors is an integer number (35984336703).

Almost surely, 2^143920597421 is an apocalyptic number.

It is an amenable number.

143920597421 is a deficient number, since it is larger than the sum of its proper divisors (16749391).

143920597421 is an equidigital number, since it uses as much as digits as its factorization.

143920597421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16749390.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 143920597421 in words is "one hundred forty-three billion, nine hundred twenty million, five hundred ninety-seven thousand, four hundred twenty-one".