102800381 has 2 divisors, whose sum is σ = 102800382. Its totient is φ = 102800380.

The previous prime is 102800359. The next prime is 102800417. The reversal of 102800381 is 183008201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95374756 + 7425625 = 9766^2 + 2725^2 .

It is a cyclic number.

It is not a de Polignac number, because 102800381 - 2²² = 98606077 is a prime.

It is a super-2 number, since 2×102800381² = 21135836667490322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102800081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51400190 + 51400191.

It is an arithmetic number, because the mean of its divisors is an integer number (51400191).

Almost surely, 2^102800381 is an apocalyptic number.

It is an amenable number.

102800381 is a deficient number, since it is larger than the sum of its proper divisors (1).

102800381 is an equidigital number, since it uses as much as digits as its factorization.

102800381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 102800381 is about 10139.0522732650. The cubic root of 102800381 is about 468.4517957304.

Adding to 102800381 its reverse (183008201), we get a palindrome (285808582).

The spelling of 102800381 in words is "one hundred two million, eight hundred thousand, three hundred eighty-one".