78976481 has 4 divisors (see below), whose sum is σ = 79067412. Its totient is φ = 78885552.

The previous prime is 78976477. The next prime is 78976487. The reversal of 78976481 is 18467987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18467987 = 131 ⋅140977.

It can be written as a sum of positive squares in 2 ways, for example, as 54523456 + 24453025 = 7384^2 + 4945^2 .

It is a cyclic number.

It is not a de Polignac number, because 78976481 - 2² = 78976477 is a prime.

It is a super-2 number, since 2×78976481² = 12474569102286722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78976487) 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 in 3 ways as a sum of consecutive naturals, for example, 44150 + ... + 45903.

It is an arithmetic number, because the mean of its divisors is an integer number (19766853).

Almost surely, 2^78976481 is an apocalyptic number.

It is an amenable number.

78976481 is a deficient number, since it is larger than the sum of its proper divisors (90931).

78976481 is an equidigital number, since it uses as much as digits as its factorization.

78976481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90930.

The product of its digits is 677376, while the sum is 50.

The square root of 78976481 is about 8886.8712717131. The cubic root of 78976481 is about 429.0414577692.

The spelling of 78976481 in words is "seventy-eight million, nine hundred seventy-six thousand, four hundred eighty-one".