77135194 has 4 divisors (see below), whose sum is σ = 115702794. Its totient is φ = 38567596.

The previous prime is 77135189. The next prime is 77135197. The reversal of 77135194 is 49153177.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49153177 = 593 ⋅82889.

It can be written as a sum of positive squares in only one way, i.e., 57198969 + 19936225 = 7563^2 + 4465^2 .

It is not an unprimeable number, because it can be changed into a prime (77135197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19283797 + ... + 19283800.

Almost surely, 2^77135194 is an apocalyptic number.

77135194 is a deficient number, since it is larger than the sum of its proper divisors (38567600).

77135194 is a wasteful number, since it uses less digits than its factorization.

77135194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38567599.

The product of its digits is 26460, while the sum is 37.

The square root of 77135194 is about 8782.6644021049. The cubic root of 77135194 is about 425.6809273636.

The spelling of 77135194 in words is "seventy-seven million, one hundred thirty-five thousand, one hundred ninety-four".