100400071 has 4 divisors (see below), whose sum is σ = 100721152. Its totient is φ = 100078992.

The previous prime is 100400063. The next prime is 100400107. The reversal of 100400071 is 170004001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170004001 = 19 ⋅8947579.

It is a cyclic number.

It is not a de Polignac number, because 100400071 - 2³ = 100400063 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 (100410071) 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, 160071 + ... + 160696.

It is an arithmetic number, because the mean of its divisors is an integer number (25180288).

Almost surely, 2^100400071 is an apocalyptic number.

100400071 is a deficient number, since it is larger than the sum of its proper divisors (321081).

100400071 is an equidigital number, since it uses as much as digits as its factorization.

100400071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321080.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 100400071 is about 10019.9835828209. The cubic root of 100400071 is about 464.7770480889. Note that the first 3 decimals are identical.

Adding to 100400071 its reverse (170004001), we get a palindrome (270404072).

The spelling of 100400071 in words is "one hundred million, four hundred thousand, seventy-one".