100720757 has 2 divisors, whose sum is σ = 100720758. Its totient is φ = 100720756.

The previous prime is 100720721. The next prime is 100720759. The reversal of 100720757 is 757027001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100681156 + 39601 = 10034^2 + 199^2 .

It is a cyclic number.

It is not a de Polignac number, because 100720757 - 2⁶ = 100720693 is a prime.

Together with 100720759, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100720759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50360378 + 50360379.

It is an arithmetic number, because the mean of its divisors is an integer number (50360379).

Almost surely, 2^100720757 is an apocalyptic number.

It is an amenable number.

100720757 is a deficient number, since it is larger than the sum of its proper divisors (1).

100720757 is an equidigital number, since it uses as much as digits as its factorization.

100720757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3430, while the sum is 29.

The square root of 100720757 is about 10035.9731466361. The cubic root of 100720757 is about 465.2713674056.

Adding to 100720757 its reverse (757027001), we get a palindrome (857747758).

The spelling of 100720757 in words is "one hundred million, seven hundred twenty thousand, seven hundred fifty-seven".