102978387 has 6 divisors (see below), whose sum is σ = 148746572. Its totient is φ = 68652252.

The previous prime is 102978377. The next prime is 102978389. The reversal of 102978387 is 783879201.

It is not a de Polignac number, because 102978387 - 2⁴ = 102978371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102978389) 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 5 ways as a sum of consecutive naturals, for example, 5721013 + ... + 5721030.

Almost surely, 2^102978387 is an apocalyptic number.

102978387 is a deficient number, since it is larger than the sum of its proper divisors (45768185).

102978387 is a wasteful number, since it uses less digits than its factorization.

102978387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11442049 (or 11442046 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 102978387 is about 10147.8267131441. The cubic root of 102978387 is about 468.7220254239.

The spelling of 102978387 in words is "one hundred two million, nine hundred seventy-eight thousand, three hundred eighty-seven".