100019501 has 2 divisors, whose sum is σ = 100019502. Its totient is φ = 100019500.

The previous prime is 100019471. The next prime is 100019503. The reversal of 100019501 is 105910001.

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., 82337476 + 17682025 = 9074^2 + 4205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100019501 is a prime.

Together with 100019503, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100019501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100019503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50009750 + 50009751.

It is an arithmetic number, because the mean of its divisors is an integer number (50009751).

Almost surely, 2^100019501 is an apocalyptic number.

It is an amenable number.

100019501 is a deficient number, since it is larger than the sum of its proper divisors (1).

100019501 is an equidigital number, since it uses as much as digits as its factorization.

100019501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45, while the sum is 17.

The square root of 100019501 is about 10000.9750024685. The cubic root of 100019501 is about 464.1890532748.

Adding to 100019501 its reverse (105910001), we get a palindrome (205929502).

The spelling of 100019501 in words is "one hundred million, nineteen thousand, five hundred one".