77989195 has 8 divisors (see below), whose sum is σ = 94772160. Its totient is φ = 61601280.

The previous prime is 77989157. The next prime is 77989199. The reversal of 77989195 is 59198977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77989195 - 2¹³ = 77981003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77989199) 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 7 ways as a sum of consecutive naturals, for example, 98326 + ... + 99115.

It is an arithmetic number, because the mean of its divisors is an integer number (11846520).

Almost surely, 2^77989195 is an apocalyptic number.

77989195 is a deficient number, since it is larger than the sum of its proper divisors (16782965).

77989195 is a wasteful number, since it uses less digits than its factorization.

77989195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197525.

The product of its digits is 1428840, while the sum is 55.

The square root of 77989195 is about 8831.1491324742. The cubic root of 77989195 is about 427.2461381660.

The spelling of 77989195 in words is "seventy-seven million, nine hundred eighty-nine thousand, one hundred ninety-five".