100519897 has 2 divisors, whose sum is σ = 100519898. Its totient is φ = 100519896.

The previous prime is 100519891. The next prime is 100519901. The reversal of 100519897 is 798915001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79762761 + 20757136 = 8931^2 + 4556^2 .

It is an emirp because it is prime and its reverse (798915001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100519897 - 2¹¹ = 100517849 is a prime.

It is not a weakly prime, because it can be changed into another prime (100519891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50259948 + 50259949.

It is an arithmetic number, because the mean of its divisors is an integer number (50259949).

Almost surely, 2^100519897 is an apocalyptic number.

It is an amenable number.

100519897 is a deficient number, since it is larger than the sum of its proper divisors (1).

100519897 is an equidigital number, since it uses as much as digits as its factorization.

100519897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 100519897 is about 10025.9611509321. The cubic root of 100519897 is about 464.9618760897.

It can be divided in two parts, 1005 and 19897, that added together give a palindrome (20902).

The spelling of 100519897 in words is "one hundred million, five hundred nineteen thousand, eight hundred ninety-seven".