78583361 has 4 divisors (see below), whose sum is σ = 78720132. Its totient is φ = 78446592.

The previous prime is 78583319. The next prime is 78583381. The reversal of 78583361 is 16338587.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16338587 = 659 ⋅24793.

It can be written as a sum of positive squares in 2 ways, for example, as 44302336 + 34281025 = 6656^2 + 5855^2 .

It is a cyclic number.

It is not a de Polignac number, because 78583361 - 2¹⁰ = 78582337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78583381) 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, 67520 + ... + 68673.

It is an arithmetic number, because the mean of its divisors is an integer number (19680033).

Almost surely, 2^78583361 is an apocalyptic number.

It is an amenable number.

78583361 is a deficient number, since it is larger than the sum of its proper divisors (136771).

78583361 is a wasteful number, since it uses less digits than its factorization.

78583361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136770.

The product of its digits is 120960, while the sum is 41.

The square root of 78583361 is about 8864.7256584736. The cubic root of 78583361 is about 428.3283956628.

The spelling of 78583361 in words is "seventy-eight million, five hundred eighty-three thousand, three hundred sixty-one".