100452391 has 4 divisors (see below), whose sum is σ = 108179512. Its totient is φ = 92725272.

The previous prime is 100452389. The next prime is 100452403. The reversal of 100452391 is 193254001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193254001 = 811 ⋅238291.

It is a cyclic number.

It is not a de Polignac number, because 100452391 - 2¹ = 100452389 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 (100152391) 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, 3863541 + ... + 3863566.

It is an arithmetic number, because the mean of its divisors is an integer number (27044878).

Almost surely, 2^100452391 is an apocalyptic number.

100452391 is a deficient number, since it is larger than the sum of its proper divisors (7727121).

100452391 is an equidigital number, since it uses as much as digits as its factorization.

100452391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7727120.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 100452391 is about 10022.5940255006. The cubic root of 100452391 is about 464.8577681924.

The spelling of 100452391 in words is "one hundred million, four hundred fifty-two thousand, three hundred ninety-one".