102017381 has 2 divisors, whose sum is σ = 102017382. Its totient is φ = 102017380.

The previous prime is 102017369. The next prime is 102017387. The reversal of 102017381 is 183710201.

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., 55368481 + 46648900 = 7441^2 + 6830^2 .

It is an emirp because it is prime and its reverse (183710201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102017381 - 2⁶ = 102017317 is a prime.

It is a super-2 number, since 2×102017381² = 20815092052198322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102017387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51008690 + 51008691.

It is an arithmetic number, because the mean of its divisors is an integer number (51008691).

Almost surely, 2^102017381 is an apocalyptic number.

It is an amenable number.

102017381 is a deficient number, since it is larger than the sum of its proper divisors (1).

102017381 is an equidigital number, since it uses as much as digits as its factorization.

102017381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 102017381 is about 10100.3653894302. The cubic root of 102017381 is about 467.2594104608.

Adding to 102017381 its reverse (183710201), we get a palindrome (285727582).

The spelling of 102017381 in words is "one hundred two million, seventeen thousand, three hundred eighty-one".