78459161 has 4 divisors (see below), whose sum is σ = 85591824. Its totient is φ = 71326500.

The previous prime is 78459149. The next prime is 78459169. The reversal of 78459161 is 16195487.

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 a de Polignac number, because none of the positive numbers 2^k-78459161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78459169) 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, 3566315 + ... + 3566336.

It is an arithmetic number, because the mean of its divisors is an integer number (21397956).

Almost surely, 2^78459161 is an apocalyptic number.

It is an amenable number.

78459161 is a deficient number, since it is larger than the sum of its proper divisors (7132663).

78459161 is a wasteful number, since it uses less digits than its factorization.

78459161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7132662.

The product of its digits is 60480, while the sum is 41.

The square root of 78459161 is about 8857.7175954080. The cubic root of 78459161 is about 428.1026208204.

The spelling of 78459161 in words is "seventy-eight million, four hundred fifty-nine thousand, one hundred sixty-one".