143172997633 has 2 divisors, whose sum is σ = 143172997634. Its totient is φ = 143172997632.

The previous prime is 143172997631. The next prime is 143172997657. The reversal of 143172997633 is 336799271341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75577157569 + 67595840064 = 274913^2 + 259992^2 .

It is a cyclic number.

It is not a de Polignac number, because 143172997633 - 2¹ = 143172997631 is a prime.

Together with 143172997631, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (143172997631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71586498816 + 71586498817.

It is an arithmetic number, because the mean of its divisors is an integer number (71586498817).

Almost surely, 2^143172997633 is an apocalyptic number.

It is an amenable number.

143172997633 is a deficient number, since it is larger than the sum of its proper divisors (1).

143172997633 is an equidigital number, since it uses as much as digits as its factorization.

143172997633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5143824, while the sum is 55.

It can be divided in two parts, 143172 and 997633, that added together give a triangular number (1140805 = T₁₅₁₀).

The spelling of 143172997633 in words is "one hundred forty-three billion, one hundred seventy-two million, nine hundred ninety-seven thousand, six hundred thirty-three".