143648973 has 12 divisors (see below), whose sum is σ = 223454140. Its totient is φ = 88399296.

The previous prime is 143648971. The next prime is 143649001. The reversal of 143648973 is 379846341.

It can be written as a sum of positive squares in 2 ways, for example, as 5774409 + 137874564 = 2403^2 + 11742^2 .

It is not a de Polignac number, because 143648973 - 2¹ = 143648971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143648971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 613768 + ... + 614001.

Almost surely, 2^143648973 is an apocalyptic number.

143648973 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

143648973 is a deficient number, since it is larger than the sum of its proper divisors (79805167).

143648973 is a wasteful number, since it uses less digits than its factorization.

143648973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227788 (or 1227785 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 143648973 is about 11985.3649506388. The cubic root of 143648973 is about 523.7220290635.

The spelling of 143648973 in words is "one hundred forty-three million, six hundred forty-eight thousand, nine hundred seventy-three".