101603861 has 2 divisors, whose sum is σ = 101603862. Its totient is φ = 101603860.

The previous prime is 101603851. The next prime is 101603867. The reversal of 101603861 is 168306101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76912900 + 24690961 = 8770^2 + 4969^2 .

It is an emirp because it is prime and its reverse (168306101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101603861 - 2¹⁸ = 101341717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101603861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101603867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50801930 + 50801931.

It is an arithmetic number, because the mean of its divisors is an integer number (50801931).

Almost surely, 2^101603861 is an apocalyptic number.

It is an amenable number.

101603861 is a deficient number, since it is larger than the sum of its proper divisors (1).

101603861 is an equidigital number, since it uses as much as digits as its factorization.

101603861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 101603861 is about 10079.8740567529. The cubic root of 101603861 is about 466.6272215526.

Adding to 101603861 its reverse (168306101), we get a palindrome (269909962).

The spelling of 101603861 in words is "one hundred one million, six hundred three thousand, eight hundred sixty-one".