78204694 has 4 divisors (see below), whose sum is σ = 117307044. Its totient is φ = 39102346.

The previous prime is 78204691. The next prime is 78204697. The reversal of 78204694 is 49640287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49640287 = 727 ⋅68281.

It is an interprime number because it is at equal distance from previous prime (78204691) and next prime (78204697).

It is a super-2 number, since 2×78204694² = 12231948327267272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78204691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19551172 + ... + 19551175.

It is an arithmetic number, because the mean of its divisors is an integer number (29326761).

Almost surely, 2^78204694 is an apocalyptic number.

78204694 is a deficient number, since it is larger than the sum of its proper divisors (39102350).

78204694 is a wasteful number, since it uses less digits than its factorization.

78204694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39102349.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 78204694 is about 8843.3417891655. The cubic root of 78204694 is about 427.6392970821.

The spelling of 78204694 in words is "seventy-eight million, two hundred four thousand, six hundred ninety-four".