102091649 has 8 divisors (see below), whose sum is σ = 114965760. Its totient is φ = 89816400.

The previous prime is 102091637. The next prime is 102091651. The reversal of 102091649 is 946190201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102091649 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 (102091669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149354 + ... + 150035.

It is an arithmetic number, because the mean of its divisors is an integer number (14370720).

Almost surely, 2^102091649 is an apocalyptic number.

It is an amenable number.

102091649 is a deficient number, since it is larger than the sum of its proper divisors (12874111).

102091649 is a wasteful number, since it uses less digits than its factorization.

102091649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299431.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 102091649 is about 10104.0412212144. The cubic root of 102091649 is about 467.3727702429.

The spelling of 102091649 in words is "one hundred two million, ninety-one thousand, six hundred forty-nine".