77794394 has 4 divisors (see below), whose sum is σ = 116691594. Its totient is φ = 38897196.

The previous prime is 77794393. The next prime is 77794399. The reversal of 77794394 is 49349777.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 68277169 + 9517225 = 8263^2 + 3085^2 .

It is not an unprimeable number, because it can be changed into a prime (77794393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19448597 + ... + 19448600.

Almost surely, 2^77794394 is an apocalyptic number.

77794394 is a deficient number, since it is larger than the sum of its proper divisors (38897200).

77794394 is a wasteful number, since it uses less digits than its factorization.

77794394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38897199.

The product of its digits is 1333584, while the sum is 50.

The square root of 77794394 is about 8820.1130378244. The cubic root of 77794394 is about 426.8901171952.

The spelling of 77794394 in words is "seventy-seven million, seven hundred ninety-four thousand, three hundred ninety-four".