102561623 has 8 divisors (see below), whose sum is σ = 109632096. Its totient is φ = 95708800.

The previous prime is 102561619. The next prime is 102561631. The reversal of 102561623 is 326165201.

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

It is a cyclic number.

It is not a de Polignac number, because 102561623 - 2² = 102561619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102561592 and 102561601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102561653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53438 + ... + 55323.

It is an arithmetic number, because the mean of its divisors is an integer number (13704012).

Almost surely, 2^102561623 is an apocalyptic number.

102561623 is a deficient number, since it is larger than the sum of its proper divisors (7070473).

102561623 is a wasteful number, since it uses less digits than its factorization.

102561623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108825.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 102561623 is about 10127.2712514280. The cubic root of 102561623 is about 468.0888485828.

The spelling of 102561623 in words is "one hundred two million, five hundred sixty-one thousand, six hundred twenty-three".