100871431 has 2 divisors, whose sum is σ = 100871432. Its totient is φ = 100871430.

The previous prime is 100871429. The next prime is 100871467. The reversal of 100871431 is 134178001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100871431 - 2¹ = 100871429 is a prime.

It is a super-2 number, since 2×100871431² = 20350091183975522, which contains 22 as substring.

Together with 100871429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 100871396 and 100871405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100871411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50435715 + 50435716.

It is an arithmetic number, because the mean of its divisors is an integer number (50435716).

Almost surely, 2^100871431 is an apocalyptic number.

100871431 is a deficient number, since it is larger than the sum of its proper divisors (1).

100871431 is an equidigital number, since it uses as much as digits as its factorization.

100871431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 100871431 is about 10043.4770373611. The cubic root of 100871431 is about 465.5032605838.

The spelling of 100871431 in words is "one hundred million, eight hundred seventy-one thousand, four hundred thirty-one".