100728547 has 2 divisors, whose sum is σ = 100728548. Its totient is φ = 100728546.

The previous prime is 100728533. The next prime is 100728637. The reversal of 100728547 is 745827001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100728547 - 2¹⁵ = 100695779 is a prime.

It is not a weakly prime, because it can be changed into another prime (100728647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50364273 + 50364274.

It is an arithmetic number, because the mean of its divisors is an integer number (50364274).

Almost surely, 2^100728547 is an apocalyptic number.

100728547 is a deficient number, since it is larger than the sum of its proper divisors (1).

100728547 is an equidigital number, since it uses as much as digits as its factorization.

100728547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 100728547 is about 10036.3612430004. The cubic root of 100728547 is about 465.2833621874.

The spelling of 100728547 in words is "one hundred million, seven hundred twenty-eight thousand, five hundred forty-seven".