100005391 has 2 divisors, whose sum is σ = 100005392. Its totient is φ = 100005390.

The previous prime is 100005383. The next prime is 100005397. The reversal of 100005391 is 193500001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100005391 - 2³ = 100005383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100005397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50002695 + 50002696.

It is an arithmetic number, because the mean of its divisors is an integer number (50002696).

Almost surely, 2^100005391 is an apocalyptic number.

100005391 is a deficient number, since it is larger than the sum of its proper divisors (1).

100005391 is an equidigital number, since it uses as much as digits as its factorization.

100005391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135, while the sum is 19.

The square root of 100005391 is about 10000.2695463672. The cubic root of 100005391 is about 464.1672241465.

Adding to 100005391 its reverse (193500001), we get a palindrome (293505392).

The spelling of 100005391 in words is "one hundred million, five thousand, three hundred ninety-one".