100720357 has 2 divisors, whose sum is σ = 100720358. Its totient is φ = 100720356.

The previous prime is 100720351. The next prime is 100720369. The reversal of 100720357 is 753027001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65270241 + 35450116 = 8079^2 + 5954^2 .

It is a cyclic number.

It is not a de Polignac number, because 100720357 - 2¹¹ = 100718309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100720351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50360178 + 50360179.

It is an arithmetic number, because the mean of its divisors is an integer number (50360179).

Almost surely, 2^100720357 is an apocalyptic number.

It is an amenable number.

100720357 is a deficient number, since it is larger than the sum of its proper divisors (1).

100720357 is an equidigital number, since it uses as much as digits as its factorization.

100720357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 100720357 is about 10035.9532183047. The cubic root of 100720357 is about 465.2707514823.

Adding to 100720357 its reverse (753027001), we get a palindrome (853747358).

The spelling of 100720357 in words is "one hundred million, seven hundred twenty thousand, three hundred fifty-seven".