100428007 has 4 divisors (see below), whose sum is σ = 100506736. Its totient is φ = 100349280.

The previous prime is 100428001. The next prime is 100428011. The reversal of 100428007 is 700824001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 700824001 = 13331 ⋅52571.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100428007 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 (100428001) 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, 37419 + ... + 40012.

It is an arithmetic number, because the mean of its divisors is an integer number (25126684).

Almost surely, 2^100428007 is an apocalyptic number.

100428007 is a deficient number, since it is larger than the sum of its proper divisors (78729).

100428007 is an equidigital number, since it uses as much as digits as its factorization.

100428007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78728.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 100428007 is about 10021.3775001244. The cubic root of 100428007 is about 464.8201516691.

The spelling of 100428007 in words is "one hundred million, four hundred twenty-eight thousand, seven".