102004381 has 2 divisors, whose sum is σ = 102004382. Its totient is φ = 102004380.

The previous prime is 102004373. The next prime is 102004387. The reversal of 102004381 is 183400201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78481881 + 23522500 = 8859^2 + 4850^2 .

It is a cyclic number.

It is not a de Polignac number, because 102004381 - 2³ = 102004373 is a prime.

It is a super-2 number, since 2×102004381² = 20809787486386322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102004387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51002190 + 51002191.

It is an arithmetic number, because the mean of its divisors is an integer number (51002191).

Almost surely, 2^102004381 is an apocalyptic number.

It is an amenable number.

102004381 is a deficient number, since it is larger than the sum of its proper divisors (1).

102004381 is an equidigital number, since it uses as much as digits as its factorization.

102004381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 102004381 is about 10099.7218278525. The cubic root of 102004381 is about 467.2395621097.

Adding to 102004381 its reverse (183400201), we get a palindrome (285404582).

The spelling of 102004381 in words is "one hundred two million, four thousand, three hundred eighty-one".