78364654 has 4 divisors (see below), whose sum is σ = 117546984. Its totient is φ = 39182326.

The previous prime is 78364639. The next prime is 78364669. The reversal of 78364654 is 45646387.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45646387 = 1039 ⋅43933.

It is an interprime number because it is at equal distance from previous prime (78364639) and next prime (78364669).

It is a super-2 number, since 2×78364654² = 12282037993079432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78364654.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19591162 + ... + 19591165.

It is an arithmetic number, because the mean of its divisors is an integer number (29386746).

Almost surely, 2^78364654 is an apocalyptic number.

78364654 is a deficient number, since it is larger than the sum of its proper divisors (39182330).

78364654 is a wasteful number, since it uses less digits than its factorization.

78364654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39182329.

The product of its digits is 483840, while the sum is 43.

The square root of 78364654 is about 8852.3812615589. The cubic root of 78364654 is about 427.9306632082.

The spelling of 78364654 in words is "seventy-eight million, three hundred sixty-four thousand, six hundred fifty-four".