102164078 has 4 divisors (see below), whose sum is σ = 153246120. Its totient is φ = 51082038.

The previous prime is 102164077. The next prime is 102164099. The reversal of 102164078 is 870461201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 870461201 = 41 ⋅21230761.

It is a self number, because there is not a number n which added to its sum of digits gives 102164078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102164077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25541018 + ... + 25541021.

It is an arithmetic number, because the mean of its divisors is an integer number (38311530).

Almost surely, 2^102164078 is an apocalyptic number.

102164078 is a deficient number, since it is larger than the sum of its proper divisors (51082042).

102164078 is an equidigital number, since it uses as much as digits as its factorization.

102164078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51082041.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 102164078 is about 10107.6247457056. The cubic root of 102164078 is about 467.4832701077.

The spelling of 102164078 in words is "one hundred two million, one hundred sixty-four thousand, seventy-eight".