102019879 has 8 divisors (see below), whose sum is σ = 110326832. Its totient is φ = 93778560.

The previous prime is 102019871. The next prime is 102019891. The reversal of 102019879 is 978910201.

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 102019879 - 2³ = 102019871 is a prime.

It is a super-2 number, since 2×102019879² = 20816111422349282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102019871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13149 + ... + 19414.

It is an arithmetic number, because the mean of its divisors is an integer number (13790854).

Almost surely, 2^102019879 is an apocalyptic number.

102019879 is a deficient number, since it is larger than the sum of its proper divisors (8306953).

102019879 is a wasteful number, since it uses less digits than its factorization.

102019879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32817.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 102019879 is about 10100.4890475660. The cubic root of 102019879 is about 467.2632242046.

The spelling of 102019879 in words is "one hundred two million, nineteen thousand, eight hundred seventy-nine".