102090361 has 2 divisors, whose sum is σ = 102090362.
Its totient is φ = 102090360.
The previous prime is 102090343. The next prime is 102090367. The reversal of 102090361 is 163090201.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 101384761 + 705600 = 10069^2 + 840^2
It is a cyclic number.
It is not a de Polignac number, because 102090361 - 29 = 102089849 is a prime.
It is a super-2 number, since 2×1020903612 = 20844883618220642, which contains 22 as substring.
It is not a weakly prime, because it can be changed into another prime (102090367) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51045180 + 51045181.
It is an arithmetic number, because the mean of its divisors is an integer number (51045181).
Almost surely, 2102090361 is an apocalyptic number.
It is an amenable number.
102090361 is a deficient number, since it is larger than the sum of its proper divisors (1).
102090361 is an equidigital number, since it uses as much as digits as its factorization.
102090361 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 324, while the sum is 22.
The square root of 102090361 is about 10103.9774841396.
The cubic root of 102090361 is about 467.3708047584.
The spelling of 102090361 in words is "one hundred two million, ninety thousand, three hundred sixty-one".