78860761 has 4 divisors (see below), whose sum is σ = 90126592. Its totient is φ = 67594932.

The previous prime is 78860713. The next prime is 78860797. The reversal of 78860761 is 16706887.

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 not a de Polignac number, because 78860761 - 2¹¹ = 78858713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78860701) 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, 5632905 + ... + 5632918.

It is an arithmetic number, because the mean of its divisors is an integer number (22531648).

Almost surely, 2^78860761 is an apocalyptic number.

It is an amenable number.

78860761 is a deficient number, since it is larger than the sum of its proper divisors (11265831).

78860761 is a wasteful number, since it uses less digits than its factorization.

78860761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11265830.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 78860761 is about 8880.3581571916. The cubic root of 78860761 is about 428.8318048624.

The spelling of 78860761 in words is "seventy-eight million, eight hundred sixty thousand, seven hundred sixty-one".