100209847957 has 2 divisors, whose sum is σ = 100209847958. Its totient is φ = 100209847956.

The previous prime is 100209847949. The next prime is 100209848113. The reversal of 100209847957 is 759748902001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52829183716 + 47380664241 = 229846^2 + 217671^2 .

It is a cyclic number.

It is not a de Polignac number, because 100209847957 - 2³ = 100209847949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100209847757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50104923978 + 50104923979.

It is an arithmetic number, because the mean of its divisors is an integer number (50104923979).

Almost surely, 2^100209847957 is an apocalyptic number.

It is an amenable number.

100209847957 is a deficient number, since it is larger than the sum of its proper divisors (1).

100209847957 is an equidigital number, since it uses as much as digits as its factorization.

100209847957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The spelling of 100209847957 in words is "one hundred billion, two hundred nine million, eight hundred forty-seven thousand, nine hundred fifty-seven".