100431959 has 4 divisors (see below), whose sum is σ = 103895160. Its totient is φ = 96968760.

The previous prime is 100431953. The next prime is 100431973. The reversal of 100431959 is 959134001.

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 100431959 - 2¹⁶ = 100366423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100431953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1731557 + ... + 1731614.

It is an arithmetic number, because the mean of its divisors is an integer number (25973790).

Almost surely, 2^100431959 is an apocalyptic number.

100431959 is a deficient number, since it is larger than the sum of its proper divisors (3463201).

100431959 is an equidigital number, since it uses as much as digits as its factorization.

100431959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3463200.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 100431959 is about 10021.5746766663. The cubic root of 100431959 is about 464.8262487238.

The spelling of 100431959 in words is "one hundred million, four hundred thirty-one thousand, nine hundred fifty-nine".