100454991 has 32 divisors (see below), whose sum is σ = 165677568. Its totient is φ = 52721280.

The previous prime is 100454953. The next prime is 100455011. The reversal of 100454991 is 199454001.

It is not a de Polignac number, because 100454991 - 2²¹ = 98357839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100454491) 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 31 ways as a sum of consecutive naturals, for example, 61161 + ... + 62781.

It is an arithmetic number, because the mean of its divisors is an integer number (5177424).

Almost surely, 2^100454991 is an apocalyptic number.

100454991 is a deficient number, since it is larger than the sum of its proper divisors (65222577).

100454991 is a wasteful number, since it uses less digits than its factorization.

100454991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1871.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 100454991 is about 10022.7237316011. The cubic root of 100454991 is about 464.8617787814.

The spelling of 100454991 in words is "one hundred million, four hundred fifty-four thousand, nine hundred ninety-one".