77994706 has 4 divisors (see below), whose sum is σ = 116992062. Its totient is φ = 38997352.

The previous prime is 77994701. The next prime is 77994727. The reversal of 77994706 is 60749977.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60749977 = 4129 ⋅14713.

It can be written as a sum of positive squares in only one way, i.e., 67914081 + 10080625 = 8241^2 + 3175^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 77994706.

It is not an unprimeable number, because it can be changed into a prime (77994701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19498675 + ... + 19498678.

Almost surely, 2^77994706 is an apocalyptic number.

77994706 is a deficient number, since it is larger than the sum of its proper divisors (38997356).

77994706 is a wasteful number, since it uses less digits than its factorization.

77994706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38997355.

The product of its (nonzero) digits is 666792, while the sum is 49.

The square root of 77994706 is about 8831.4611475112. The cubic root of 77994706 is about 427.2562015173.

The spelling of 77994706 in words is "seventy-seven million, nine hundred ninety-four thousand, seven hundred six".