100280591 has 4 divisors (see below), whose sum is σ = 100320912. Its totient is φ = 100240272.

The previous prime is 100280573. The next prime is 100280617. The reversal of 100280591 is 195082001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195082001 = 1913 ⋅101977.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100280591 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100280591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100280561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16166 + ... + 21491.

It is an arithmetic number, because the mean of its divisors is an integer number (25080228).

Almost surely, 2^100280591 is an apocalyptic number.

100280591 is a deficient number, since it is larger than the sum of its proper divisors (40321).

100280591 is an equidigital number, since it uses as much as digits as its factorization.

100280591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40320.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 100280591 is about 10014.0197223692. The cubic root of 100280591 is about 464.5926073012.

The spelling of 100280591 in words is "one hundred million, two hundred eighty thousand, five hundred ninety-one".