100400207 has 2 divisors, whose sum is σ = 100400208. Its totient is φ = 100400206.

The previous prime is 100400197. The next prime is 100400257. The reversal of 100400207 is 702004001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100400207 - 2¹⁴ = 100383823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100400191 and 100400200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100400257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50200103 + 50200104.

It is an arithmetic number, because the mean of its divisors is an integer number (50200104).

Almost surely, 2^100400207 is an apocalyptic number.

100400207 is a deficient number, since it is larger than the sum of its proper divisors (1).

100400207 is an equidigital number, since it uses as much as digits as its factorization.

100400207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 100400207 is about 10019.9903692568. The cubic root of 100400207 is about 464.7772579481. Note that the first 3 decimals are identical.

Adding to 100400207 its reverse (702004001), we get a palindrome (802404208).

The spelling of 100400207 in words is "one hundred million, four hundred thousand, two hundred seven".