78791077 has 16 divisors (see below), whose sum is σ = 84637440. Its totient is φ = 73180800.

The previous prime is 78791071. The next prime is 78791099. The reversal of 78791077 is 77019787.

It is a cyclic number.

It is not a de Polignac number, because 78791077 - 2⁷ = 78790949 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 (78791071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124552 + ... + 125182.

It is an arithmetic number, because the mean of its divisors is an integer number (5289840).

Almost surely, 2^78791077 is an apocalyptic number.

It is an amenable number.

78791077 is a deficient number, since it is larger than the sum of its proper divisors (5846363).

78791077 is a wasteful number, since it uses less digits than its factorization.

78791077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804.

The product of its (nonzero) digits is 172872, while the sum is 46.

The square root of 78791077 is about 8876.4337996743. The cubic root of 78791077 is about 428.7054576092.

The spelling of 78791077 in words is "seventy-eight million, seven hundred ninety-one thousand, seventy-seven".