77994219 has 8 divisors (see below), whose sum is σ = 108513792. Its totient is φ = 49735400.

The previous prime is 77994157. The next prime is 77994227. The reversal of 77994219 is 91249977.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 77994219 - 2¹² = 77990123 is a prime.

It is a super-3 number, since 3×77994219³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (77994229) 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 7 ways as a sum of consecutive naturals, for example, 565107 + ... + 565244.

It is an arithmetic number, because the mean of its divisors is an integer number (13564224).

Almost surely, 2^77994219 is an apocalyptic number.

77994219 is a deficient number, since it is larger than the sum of its proper divisors (30519573).

77994219 is a wasteful number, since it uses less digits than its factorization.

77994219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130377.

The product of its digits is 285768, while the sum is 48.

The square root of 77994219 is about 8831.4335755867. The cubic root of 77994219 is about 427.2553122510.

The spelling of 77994219 in words is "seventy-seven million, nine hundred ninety-four thousand, two hundred nineteen".