100690217 has 2 divisors, whose sum is σ = 100690218. Its totient is φ = 100690216.

The previous prime is 100690211. The next prime is 100690241. The reversal of 100690217 is 712096001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71842576 + 28847641 = 8476^2 + 5371^2 .

It is an emirp because it is prime and its reverse (712096001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100690217 is a prime.

It is not a weakly prime, because it can be changed into another prime (100690211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50345108 + 50345109.

It is an arithmetic number, because the mean of its divisors is an integer number (50345109).

Almost surely, 2^100690217 is an apocalyptic number.

It is an amenable number.

100690217 is a deficient number, since it is larger than the sum of its proper divisors (1).

100690217 is an equidigital number, since it uses as much as digits as its factorization.

100690217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 100690217 is about 10034.4515046912. The cubic root of 100690217 is about 465.2243369676.

The spelling of 100690217 in words is "one hundred million, six hundred ninety thousand, two hundred seventeen".