143781011 has 4 divisors (see below), whose sum is σ = 156852024. Its totient is φ = 130710000.

The previous prime is 143780993. The next prime is 143781047. The reversal of 143781011 is 110187341.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 143781011 - 2¹⁸ = 143518867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143781061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6535490 + ... + 6535511.

It is an arithmetic number, because the mean of its divisors is an integer number (39213006).

Almost surely, 2^143781011 is an apocalyptic number.

143781011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

143781011 is a deficient number, since it is larger than the sum of its proper divisors (13071013).

143781011 is a wasteful number, since it uses less digits than its factorization.

143781011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13071012.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 143781011 is about 11990.8719866405. The cubic root of 143781011 is about 523.8824433275.

The spelling of 143781011 in words is "one hundred forty-three million, seven hundred eighty-one thousand, eleven".