102891919 has 8 divisors (see below), whose sum is σ = 113509872. Its totient is φ = 92660160.

The previous prime is 102891917. The next prime is 102891959. The reversal of 102891919 is 919198201.

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 102891919 - 2¹ = 102891917 is a prime.

It is a super-2 number, since 2×102891919² = 21173493991005122, 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 (102891917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95989 + ... + 97054.

It is an arithmetic number, because the mean of its divisors is an integer number (14188734).

Almost surely, 2^102891919 is an apocalyptic number.

102891919 is a deficient number, since it is larger than the sum of its proper divisors (10617953).

102891919 is a wasteful number, since it uses less digits than its factorization.

102891919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193097.

The product of its (nonzero) digits is 11664, while the sum is 40.

The square root of 102891919 is about 10143.5653988132. The cubic root of 102891919 is about 468.5907978709.

The spelling of 102891919 in words is "one hundred two million, eight hundred ninety-one thousand, nine hundred nineteen".