100078397 has 4 divisors (see below), whose sum is σ = 100141536. Its totient is φ = 100015260.

The previous prime is 100078387. The next prime is 100078399. The reversal of 100078397 is 793870001.

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: 793870001 = 23 ⋅34516087.

It is a cyclic number.

It is not a de Polignac number, because 100078397 - 2⁸ = 100078141 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 (100078399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29129 + ... + 32382.

It is an arithmetic number, because the mean of its divisors is an integer number (25035384).

Almost surely, 2^100078397 is an apocalyptic number.

It is an amenable number.

100078397 is a deficient number, since it is larger than the sum of its proper divisors (63139).

100078397 is an equidigital number, since it uses as much as digits as its factorization.

100078397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63138.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 100078397 is about 10003.9190820398. The cubic root of 100078397 is about 464.2801472243.

It can be divided in two parts, 1000 and 78397, that added together give a palindrome (79397).

The spelling of 100078397 in words is "one hundred million, seventy-eight thousand, three hundred ninety-seven".