102691117 has 4 divisors (see below), whose sum is σ = 106232220. Its totient is φ = 99150016.

The previous prime is 102691111. The next prime is 102691129. The reversal of 102691117 is 711196201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16924996 + 85766121 = 4114^2 + 9261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102691117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102691111) 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, 1770508 + ... + 1770565.

It is an arithmetic number, because the mean of its divisors is an integer number (26558055).

Almost surely, 2^102691117 is an apocalyptic number.

It is an amenable number.

102691117 is a deficient number, since it is larger than the sum of its proper divisors (3541103).

102691117 is an equidigital number, since it uses as much as digits as its factorization.

102691117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3541102.

The product of its (nonzero) digits is 756, while the sum is 28.

The square root of 102691117 is about 10133.6625659235. The cubic root of 102691117 is about 468.2857682584.

The spelling of 102691117 in words is "one hundred two million, six hundred ninety-one thousand, one hundred seventeen".