78827461 has 4 divisors (see below), whose sum is σ = 80750124. Its totient is φ = 76904800.

The previous prime is 78827431. The next prime is 78827477. The reversal of 78827461 is 16472887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16472887 = 173 ⋅95219.

It can be written as a sum of positive squares in 2 ways, for example, as 10764961 + 68062500 = 3281^2 + 8250^2 .

It is a cyclic number.

It is not a de Polignac number, because 78827461 - 2¹⁷ = 78696389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78827401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 961270 + ... + 961351.

It is an arithmetic number, because the mean of its divisors is an integer number (20187531).

Almost surely, 2^78827461 is an apocalyptic number.

It is an amenable number.

78827461 is a deficient number, since it is larger than the sum of its proper divisors (1922663).

78827461 is a wasteful number, since it uses less digits than its factorization.

78827461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922662.

The product of its digits is 150528, while the sum is 43.

The square root of 78827461 is about 8878.4830348433. The cubic root of 78827461 is about 428.7714363962.

The spelling of 78827461 in words is "seventy-eight million, eight hundred twenty-seven thousand, four hundred sixty-one".