100691424 has 144 divisors (see below), whose sum is σ = 310407552. Its totient is φ = 32047488.

The previous prime is 100691389. The next prime is 100691429. The reversal of 100691424 is 424196001.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100691429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178567 + ... + 179129.

It is an arithmetic number, because the mean of its divisors is an integer number (2155608).

Almost surely, 2^100691424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100691424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155203776).

100691424 is an abundant number, since it is smaller than the sum of its proper divisors (209716128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100691424 is an equidigital number, since it uses as much as digits as its factorization.

100691424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611 (or 591 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 100691424 is about 10034.5116473100. The cubic root of 100691424 is about 465.2261958821.

The spelling of 100691424 in words is "one hundred million, six hundred ninety-one thousand, four hundred twenty-four".