102206649 has 4 divisors (see below), whose sum is σ = 136275536. Its totient is φ = 68137764.

The previous prime is 102206639. The next prime is 102206653. The reversal of 102206649 is 946602201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 102206649 - 2¹² = 102202553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102206609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17034439 + ... + 17034444.

It is an arithmetic number, because the mean of its divisors is an integer number (34068884).

Almost surely, 2^102206649 is an apocalyptic number.

It is an amenable number.

102206649 is a deficient number, since it is larger than the sum of its proper divisors (34068887).

102206649 is an equidigital number, since it uses as much as digits as its factorization.

102206649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34068886.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 102206649 is about 10109.7304118359. The cubic root of 102206649 is about 467.5481933407.

The spelling of 102206649 in words is "one hundred two million, two hundred six thousand, six hundred forty-nine".