78465211 has 4 divisors (see below), whose sum is σ = 85598424. Its totient is φ = 71332000.

The previous prime is 78465199. The next prime is 78465223. The reversal of 78465211 is 11256487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11256487 = 11 ⋅1023317.

It is an interprime number because it is at equal distance from previous prime (78465199) and next prime (78465223).

It is a cyclic number.

It is not a de Polignac number, because 78465211 - 2¹³ = 78457019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78462211) 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, 3566590 + ... + 3566611.

It is an arithmetic number, because the mean of its divisors is an integer number (21399606).

Almost surely, 2^78465211 is an apocalyptic number.

78465211 is a deficient number, since it is larger than the sum of its proper divisors (7133213).

78465211 is a wasteful number, since it uses less digits than its factorization.

78465211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7133212.

The product of its digits is 13440, while the sum is 34.

The square root of 78465211 is about 8858.0590989223. The cubic root of 78465211 is about 428.1136242275.

The spelling of 78465211 in words is "seventy-eight million, four hundred sixty-five thousand, two hundred eleven".