100249081 has 4 divisors (see below), whose sum is σ = 100305664. Its totient is φ = 100192500.

The previous prime is 100249069. The next prime is 100249091. The reversal of 100249081 is 180942001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100249081 - 2¹⁷ = 100118009 is a prime.

It is a super-3 number, since 3×100249081³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100249001) 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, 25545 + ... + 29206.

It is an arithmetic number, because the mean of its divisors is an integer number (25076416).

Almost surely, 2^100249081 is an apocalyptic number.

It is an amenable number.

100249081 is a deficient number, since it is larger than the sum of its proper divisors (56583).

100249081 is an equidigital number, since it uses as much as digits as its factorization.

100249081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56582.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 100249081 is about 10012.4463044752. The cubic root of 100249081 is about 464.5439410323.

The spelling of 100249081 in words is "one hundred million, two hundred forty-nine thousand, eighty-one".