143747897881 has 9 divisors (see below), whose sum is σ = 167220029781. Its totient is φ = 123210209052.

The previous prime is 143747897879. The next prime is 143747897897. The reversal of 143747897881 is 188798747341.

The square root of 143747897881 is 379141.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 143747897881 - 2¹ = 143747897879 is a prime.

It is a super-2 number, since 2×143747897881² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (143747897831) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2626906 + ... + 2681068.

It is an arithmetic number, because the mean of its divisors is an integer number (18580003309).

Almost surely, 2^143747897881 is an apocalyptic number.

143747897881 is the 379141-st square number.

143747897881 is the 189571-st centered octagonal number.

It is an amenable number.

143747897881 is a deficient number, since it is larger than the sum of its proper divisors (23472131900).

143747897881 is an frugal number, since it uses more digits than its factorization.

143747897881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108340 (or 54170 counting only the distinct ones).

The product of its digits is 75866112, while the sum is 67.

The spelling of 143747897881 in words is "one hundred forty-three billion, seven hundred forty-seven million, eight hundred ninety-seven thousand, eight hundred eighty-one".