100445997 has 4 divisors (see below), whose sum is σ = 133928000. Its totient is φ = 66963996.

The previous prime is 100445993. The next prime is 100445999. The reversal of 100445997 is 799544001.

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, and also an emirpimes, since its reverse is a distinct semiprime: 799544001 = 3 ⋅266514667.

It is not a de Polignac number, because 100445997 - 2² = 100445993 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 (100445993) 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, 16740997 + ... + 16741002.

It is an arithmetic number, because the mean of its divisors is an integer number (33482000).

Almost surely, 2^100445997 is an apocalyptic number.

It is an amenable number.

100445997 is a deficient number, since it is larger than the sum of its proper divisors (33482003).

100445997 is an equidigital number, since it uses as much as digits as its factorization.

100445997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33482002.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 100445997 is about 10022.2750411271. The cubic root of 100445997 is about 464.8479049341.

Adding to 100445997 its reverse (799544001), we get a palindrome (899989998).

The spelling of 100445997 in words is "one hundred million, four hundred forty-five thousand, nine hundred ninety-seven".