100394845 has 4 divisors (see below), whose sum is σ = 120473820. Its totient is φ = 80315872.

The previous prime is 100394831. The next prime is 100394857. The reversal of 100394845 is 548493001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 548493001 = 7 ⋅78356143.

It can be written as a sum of positive squares in 2 ways, for example, as 40208281 + 60186564 = 6341^2 + 7758^2 .

It is a cyclic number.

It is not a de Polignac number, because 100394845 - 2⁷ = 100394717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100394845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10039480 + ... + 10039489.

It is an arithmetic number, because the mean of its divisors is an integer number (30118455).

Almost surely, 2^100394845 is an apocalyptic number.

It is an amenable number.

100394845 is a deficient number, since it is larger than the sum of its proper divisors (20078975).

100394845 is an equidigital number, since it uses as much as digits as its factorization.

100394845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20078974.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 100394845 is about 10019.7228005569. The cubic root of 100394845 is about 464.7689837951.

It can be divided in two parts, 10039 and 4845, that added together give a square (14884 = 122²).

The spelling of 100394845 in words is "one hundred million, three hundred ninety-four thousand, eight hundred forty-five".