77008994 has 4 divisors (see below), whose sum is σ = 115513494. Its totient is φ = 38504496.

The previous prime is 77008993. The next prime is 77009003. The reversal of 77008994 is 49980077.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49980077 = 7 ⋅7140011.

It can be written as a sum of positive squares in only one way, i.e., 52635025 + 24373969 = 7255^2 + 4937^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77008993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19252247 + ... + 19252250.

Almost surely, 2^77008994 is an apocalyptic number.

77008994 is a deficient number, since it is larger than the sum of its proper divisors (38504500).

77008994 is a wasteful number, since it uses less digits than its factorization.

77008994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38504499.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 77008994 is about 8775.4768531402. The cubic root of 77008994 is about 425.4486500925.

The spelling of 77008994 in words is "seventy-seven million, eight thousand, nine hundred ninety-four".