76218493 has 6 divisors (see below), whose sum is σ = 82532634. Its totient is φ = 70355376.

The previous prime is 76218487. The next prime is 76218503. The reversal of 76218493 is 39481267.

It can be written as a sum of positive squares in 3 ways, for example, as 3849444 + 72369049 = 1962^2 + 8507^2 .

It is not a de Polignac number, because 76218493 - 2¹⁷ = 76087421 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 (76218413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 225330 + ... + 225667.

It is an arithmetic number, because the mean of its divisors is an integer number (13755439).

Almost surely, 2^76218493 is an apocalyptic number.

It is an amenable number.

76218493 is a deficient number, since it is larger than the sum of its proper divisors (6314141).

76218493 is a wasteful number, since it uses less digits than its factorization.

76218493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451023 (or 451010 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 76218493 is about 8730.3203263111. The cubic root of 76218493 is about 423.9878901401.

The spelling of 76218493 in words is "seventy-six million, two hundred eighteen thousand, four hundred ninety-three".