101911813 has 2 divisors, whose sum is σ = 101911814. Its totient is φ = 101911812.

The previous prime is 101911811. The next prime is 101911837. The reversal of 101911813 is 318119101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88792929 + 13118884 = 9423^2 + 3622^2 .

It is a cyclic number.

It is not a de Polignac number, because 101911813 - 2¹ = 101911811 is a prime.

Together with 101911811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101911811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50955906 + 50955907.

It is an arithmetic number, because the mean of its divisors is an integer number (50955907).

Almost surely, 2^101911813 is an apocalyptic number.

It is an amenable number.

101911813 is a deficient number, since it is larger than the sum of its proper divisors (1).

101911813 is an equidigital number, since it uses as much as digits as its factorization.

101911813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 25.

The square root of 101911813 is about 10095.1380872180. The cubic root of 101911813 is about 467.0981808560.

The spelling of 101911813 in words is "one hundred one million, nine hundred eleven thousand, eight hundred thirteen".