100456391 has 4 divisors (see below), whose sum is σ = 114807312. Its totient is φ = 86105472.

The previous prime is 100456373. The next prime is 100456393. The reversal of 100456391 is 193654001.

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 100456391 - 2⁶ = 100456327 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 (100456393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7175450 + ... + 7175463.

It is an arithmetic number, because the mean of its divisors is an integer number (28701828).

Almost surely, 2^100456391 is an apocalyptic number.

100456391 is a deficient number, since it is larger than the sum of its proper divisors (14350921).

100456391 is an equidigital number, since it uses as much as digits as its factorization.

100456391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14350920.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 100456391 is about 10022.7935726523. The cubic root of 100456391 is about 464.8639383007.

The spelling of 100456391 in words is "one hundred million, four hundred fifty-six thousand, three hundred ninety-one".