78803761 has 4 divisors (see below), whose sum is σ = 78829632. Its totient is φ = 78777892.

The previous prime is 78803723. The next prime is 78803771. The reversal of 78803761 is 16730887.

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: 16730887 = 19 ⋅880573.

It is a cyclic number.

It is not a de Polignac number, because 78803761 - 2¹³ = 78795569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78803771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7645 + ... + 14698.

It is an arithmetic number, because the mean of its divisors is an integer number (19707408).

Almost surely, 2^78803761 is an apocalyptic number.

It is an amenable number.

78803761 is a deficient number, since it is larger than the sum of its proper divisors (25871).

78803761 is a wasteful number, since it uses less digits than its factorization.

78803761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25870.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 78803761 is about 8877.1482470442. The cubic root of 78803761 is about 428.7284610950.

The spelling of 78803761 in words is "seventy-eight million, eight hundred three thousand, seven hundred sixty-one".