101645381 has 2 divisors, whose sum is σ = 101645382. Its totient is φ = 101645380.

The previous prime is 101645359. The next prime is 101645413. The reversal of 101645381 is 183546101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96216481 + 5428900 = 9809^2 + 2330^2 .

It is an emirp because it is prime and its reverse (183546101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101645381 - 2⁶ = 101645317 is a prime.

It is a super-2 number, since 2×101645381² = 20663566957270322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101645321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50822690 + 50822691.

It is an arithmetic number, because the mean of its divisors is an integer number (50822691).

Almost surely, 2^101645381 is an apocalyptic number.

It is an amenable number.

101645381 is a deficient number, since it is larger than the sum of its proper divisors (1).

101645381 is an equidigital number, since it uses as much as digits as its factorization.

101645381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 101645381 is about 10081.9333959316. The cubic root of 101645381 is about 466.6907746616.

The spelling of 101645381 in words is "one hundred one million, six hundred forty-five thousand, three hundred eighty-one".