78662743 has 2 divisors, whose sum is σ = 78662744. Its totient is φ = 78662742.

The previous prime is 78662729. The next prime is 78662789. The reversal of 78662743 is 34726687.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78662743 - 2⁵ = 78662711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78662743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78668743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39331371 + 39331372.

It is an arithmetic number, because the mean of its divisors is an integer number (39331372).

Almost surely, 2^78662743 is an apocalyptic number.

78662743 is a deficient number, since it is larger than the sum of its proper divisors (1).

78662743 is an equidigital number, since it uses as much as digits as its factorization.

78662743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 43.

The square root of 78662743 is about 8869.2019370403. The cubic root of 78662743 is about 428.4725742847.

It can be divided in two parts, 7866 and 2743, that added together give a square (10609 = 103²).

The spelling of 78662743 in words is "seventy-eight million, six hundred sixty-two thousand, seven hundred forty-three".