78308611 has 4 divisors (see below), whose sum is σ = 78650800. Its totient is φ = 77966424.

The previous prime is 78308603. The next prime is 78308621. The reversal of 78308611 is 11680387.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11680387 = 79 ⋅147853.

It is a cyclic number.

It is not a de Polignac number, because 78308611 - 2³ = 78308603 is a prime.

It is a super-2 number, since 2×78308611² = 12264477113498642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78308621) 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, 170751 + ... + 171208.

It is an arithmetic number, because the mean of its divisors is an integer number (19662700).

Almost surely, 2^78308611 is an apocalyptic number.

78308611 is a deficient number, since it is larger than the sum of its proper divisors (342189).

78308611 is a wasteful number, since it uses less digits than its factorization.

78308611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342188.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 78308611 is about 8849.2152759440. The cubic root of 78308611 is about 427.8286264000.

Adding to 78308611 its reverse (11680387), we get a palindrome (89988998).

The spelling of 78308611 in words is "seventy-eight million, three hundred eight thousand, six hundred eleven".