78560149 has 4 divisors (see below), whose sum is σ = 79294464. Its totient is φ = 77825836.

The previous prime is 78560147. The next prime is 78560161. The reversal of 78560149 is 94106587.

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.

It is a cyclic number.

It is not a de Polignac number, because 78560149 - 2¹ = 78560147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78560143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366997 + ... + 367210.

It is an arithmetic number, because the mean of its divisors is an integer number (19823616).

Almost surely, 2^78560149 is an apocalyptic number.

It is an amenable number.

78560149 is a deficient number, since it is larger than the sum of its proper divisors (734315).

78560149 is a wasteful number, since it uses less digits than its factorization.

78560149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734314.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 78560149 is about 8863.4163278050. The cubic root of 78560149 is about 428.2862182108.

The spelling of 78560149 in words is "seventy-eight million, five hundred sixty thousand, one hundred forty-nine".