78029249 has 4 divisors (see below), whose sum is σ = 78047364. Its totient is φ = 78011136.

The previous prime is 78029239. The next prime is 78029291. The reversal of 78029249 is 94292087.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55056400 + 22972849 = 7420^2 + 4793^2 .

It is a cyclic number.

It is not a de Polignac number, because 78029249 - 2¹⁶ = 77963713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78029209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1529 + ... + 12585.

It is an arithmetic number, because the mean of its divisors is an integer number (19511841).

Almost surely, 2^78029249 is an apocalyptic number.

It is an amenable number.

78029249 is a deficient number, since it is larger than the sum of its proper divisors (18115).

78029249 is a wasteful number, since it uses less digits than its factorization.

78029249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18114.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 78029249 is about 8833.4166096703. The cubic root of 78029249 is about 427.3192679032.

The spelling of 78029249 in words is "seventy-eight million, twenty-nine thousand, two hundred forty-nine".