78468077 has 4 divisors (see below), whose sum is σ = 80292960. Its totient is φ = 76643196.

The previous prime is 78468067. The next prime is 78468097. The reversal of 78468077 is 77086487.

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, and also an emirpimes, since its reverse is a distinct semiprime: 77086487 = 43 ⋅1792709.

It is a cyclic number.

It is not a de Polignac number, because 78468077 - 2²⁰ = 77419501 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 (78468067) 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, 912377 + ... + 912462.

It is an arithmetic number, because the mean of its divisors is an integer number (20073240).

Almost surely, 2^78468077 is an apocalyptic number.

It is an amenable number.

78468077 is a deficient number, since it is larger than the sum of its proper divisors (1824883).

78468077 is a wasteful number, since it uses less digits than its factorization.

78468077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824882.

The product of its (nonzero) digits is 526848, while the sum is 47.

The square root of 78468077 is about 8858.2208710327. The cubic root of 78468077 is about 428.1188365532.

The spelling of 78468077 in words is "seventy-eight million, four hundred sixty-eight thousand, seventy-seven".