102678617 has 4 divisors (see below), whose sum is σ = 102700596. Its totient is φ = 102656640.

The previous prime is 102678607. The next prime is 102678629. The reversal of 102678617 is 716876201.

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 67584841 + 35093776 = 8221^2 + 5924^2 .

It is a cyclic number.

It is not a de Polignac number, because 102678617 - 2⁸ = 102678361 is a prime.

It is a super-3 number, since 3×102678617³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102678607) 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, 884 + ... + 14357.

It is an arithmetic number, because the mean of its divisors is an integer number (25675149).

Almost surely, 2^102678617 is an apocalyptic number.

It is an amenable number.

102678617 is a deficient number, since it is larger than the sum of its proper divisors (21979).

102678617 is an equidigital number, since it uses as much as digits as its factorization.

102678617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21978.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 102678617 is about 10133.0457908765. The cubic root of 102678617 is about 468.2667669083.

The spelling of 102678617 in words is "one hundred two million, six hundred seventy-eight thousand, six hundred seventeen".