78053389 has 2 divisors, whose sum is σ = 78053390. Its totient is φ = 78053388.

The previous prime is 78053383. The next prime is 78053399. The reversal of 78053389 is 98335087.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71267364 + 6786025 = 8442^2 + 2605^2 .

It is a cyclic number.

It is not a de Polignac number, because 78053389 - 2⁵ = 78053357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78053383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39026694 + 39026695.

It is an arithmetic number, because the mean of its divisors is an integer number (39026695).

Almost surely, 2^78053389 is an apocalyptic number.

It is an amenable number.

78053389 is a deficient number, since it is larger than the sum of its proper divisors (1).

78053389 is an equidigital number, since it uses as much as digits as its factorization.

78053389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 78053389 is about 8834.7829062179. The cubic root of 78053389 is about 427.3633301135.

The spelling of 78053389 in words is "seventy-eight million, fifty-three thousand, three hundred eighty-nine".