78549053 has 4 divisors (see below), whose sum is σ = 85689888. Its totient is φ = 71408220.

The previous prime is 78549047. The next prime is 78549067. The reversal of 78549053 is 35094587.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35094587 = 11 ⋅3190417.

It is a cyclic number.

It is not a de Polignac number, because 78549053 - 2¹⁸ = 78286909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78549053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78549073) 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 3 ways as a sum of consecutive naturals, for example, 3570401 + ... + 3570422.

It is an arithmetic number, because the mean of its divisors is an integer number (21422472).

Almost surely, 2^78549053 is an apocalyptic number.

It is an amenable number.

78549053 is a deficient number, since it is larger than the sum of its proper divisors (7140835).

78549053 is a wasteful number, since it uses less digits than its factorization.

78549053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7140834.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 78549053 is about 8862.7903619571. The cubic root of 78549053 is about 428.2660532472.

The spelling of 78549053 in words is "seventy-eight million, five hundred forty-nine thousand, fifty-three".