78784954 has 4 divisors (see below), whose sum is σ = 118177434. Its totient is φ = 39392476.

The previous prime is 78784939. The next prime is 78784973. The reversal of 78784954 is 45948787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45948787 = 59 ⋅778793.

It can be written as a sum of positive squares in only one way, i.e., 57836025 + 20948929 = 7605^2 + 4577^2 .

It is an unprimeable number.

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, 19696237 + ... + 19696240.

Almost surely, 2^78784954 is an apocalyptic number.

78784954 is a deficient number, since it is larger than the sum of its proper divisors (39392480).

78784954 is a wasteful number, since it uses less digits than its factorization.

78784954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39392479.

The product of its digits is 2257920, while the sum is 52.

The square root of 78784954 is about 8876.0888909474. The cubic root of 78784954 is about 428.6943521575.

The spelling of 78784954 in words is "seventy-eight million, seven hundred eighty-four thousand, nine hundred fifty-four".