77879371 has 4 divisors (see below), whose sum is σ = 79156144. Its totient is φ = 76602600.

The previous prime is 77879353. The next prime is 77879401. The reversal of 77879371 is 17397877.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77879371 - 2¹³ = 77871179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77879341) 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 3 ways as a sum of consecutive naturals, for example, 638295 + ... + 638416.

It is an arithmetic number, because the mean of its divisors is an integer number (19789036).

Almost surely, 2^77879371 is an apocalyptic number.

77879371 is a deficient number, since it is larger than the sum of its proper divisors (1276773).

77879371 is a wasteful number, since it uses less digits than its factorization.

77879371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276772.

The product of its digits is 518616, while the sum is 49.

The square root of 77879371 is about 8824.9289515554. The cubic root of 77879371 is about 427.0454953197.

The spelling of 77879371 in words is "seventy-seven million, eight hundred seventy-nine thousand, three hundred seventy-one".