100307861 has 2 divisors, whose sum is σ = 100307862. Its totient is φ = 100307860.

The previous prime is 100307849. The next prime is 100307873. The reversal of 100307861 is 168703001.

It is a balanced prime because it is at equal distance from previous prime (100307849) and next prime (100307873).

It can be written as a sum of positive squares in only one way, i.e., 81558961 + 18748900 = 9031^2 + 4330^2 .

It is an emirp because it is prime and its reverse (168703001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100307861 - 2¹⁸ = 100045717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100307861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100306861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50153930 + 50153931.

It is an arithmetic number, because the mean of its divisors is an integer number (50153931).

Almost surely, 2^100307861 is an apocalyptic number.

It is an amenable number.

100307861 is a deficient number, since it is larger than the sum of its proper divisors (1).

100307861 is an equidigital number, since it uses as much as digits as its factorization.

100307861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 100307861 is about 10015.3812209022. The cubic root of 100307861 is about 464.6347167863.

The spelling of 100307861 in words is "one hundred million, three hundred seven thousand, eight hundred sixty-one".