77213694 has 32 divisors (see below), whose sum is σ = 164077056. Its totient is φ = 24140160.

The previous prime is 77213693. The next prime is 77213723. The reversal of 77213694 is 49631277.

It is a super-2 number, since 2×77213694² = 11923909082251272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77213693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32619 + ... + 34905.

It is an arithmetic number, because the mean of its divisors is an integer number (5127408).

Almost surely, 2^77213694 is an apocalyptic number.

77213694 is an abundant number, since it is smaller than the sum of its proper divisors (86863362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77213694 is a wasteful number, since it uses less digits than its factorization.

77213694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640.

The product of its digits is 63504, while the sum is 39.

The square root of 77213694 is about 8787.1322967166. The cubic root of 77213694 is about 425.8252826690.

The spelling of 77213694 in words is "seventy-seven million, two hundred thirteen thousand, six hundred ninety-four".