100143491 has 8 divisors (see below), whose sum is σ = 114701664. Its totient is φ = 85648320.

The previous prime is 100143469. The next prime is 100143503. The reversal of 100143491 is 194341001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100143491 - 2¹⁰ = 100142467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100143191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12290 + ... + 18743.

It is an arithmetic number, because the mean of its divisors is an integer number (14337708).

Almost surely, 2^100143491 is an apocalyptic number.

100143491 is a deficient number, since it is larger than the sum of its proper divisors (14558173).

100143491 is an equidigital number, since it uses as much as digits as its factorization.

100143491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31501.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 100143491 is about 10007.1719781365. The cubic root of 100143491 is about 464.3807859994.

Adding to 100143491 its reverse (194341001), we get a palindrome (294484492).

The spelling of 100143491 in words is "one hundred million, one hundred forty-three thousand, four hundred ninety-one".