102689019 has 32 divisors (see below), whose sum is σ = 159129600. Its totient is φ = 65370240.

The previous prime is 102689017. The next prime is 102689063. The reversal of 102689019 is 910986201.

It is not a de Polignac number, because 102689019 - 2¹ = 102689017 is a prime.

It is a super-2 number, since 2×102689019² = 21090069246364722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (102689017) 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 31 ways as a sum of consecutive naturals, for example, 65347 + ... + 66899.

It is an arithmetic number, because the mean of its divisors is an integer number (4972800).

Almost surely, 2^102689019 is an apocalyptic number.

102689019 is a deficient number, since it is larger than the sum of its proper divisors (56440581).

102689019 is a wasteful number, since it uses less digits than its factorization.

102689019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672 (or 1666 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 102689019 is about 10133.5590490212. The cubic root of 102689019 is about 468.2825791795.

The spelling of 102689019 in words is "one hundred two million, six hundred eighty-nine thousand, nineteen".