78103249 has 16 divisors (see below), whose sum is σ = 90961920. Its totient is φ = 65682000.

The previous prime is 78103247. The next prime is 78103279. The reversal of 78103249 is 94230187.

It is a cyclic number.

It is not a de Polignac number, because 78103249 - 2¹ = 78103247 is a prime.

It is a super-2 number, since 2×78103249² = 12200235008712002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78103247) 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 15 ways as a sum of consecutive naturals, for example, 103624 + ... + 104374.

It is an arithmetic number, because the mean of its divisors is an integer number (5685120).

Almost surely, 2^78103249 is an apocalyptic number.

It is an amenable number.

78103249 is a deficient number, since it is larger than the sum of its proper divisors (12858671).

78103249 is a wasteful number, since it uses less digits than its factorization.

78103249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 78103249 is about 8837.6042568108. The cubic root of 78103249 is about 427.4543097208.

The spelling of 78103249 in words is "seventy-eight million, one hundred three thousand, two hundred forty-nine".