78040793 has 2 divisors, whose sum is σ = 78040794. Its totient is φ = 78040792.

The previous prime is 78040783. The next prime is 78040801. The reversal of 78040793 is 39704087.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50865424 + 27175369 = 7132^2 + 5213^2 .

It is a cyclic number.

It is not a de Polignac number, because 78040793 - 2¹⁴ = 78024409 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (78040783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39020396 + 39020397.

It is an arithmetic number, because the mean of its divisors is an integer number (39020397).

Almost surely, 2^78040793 is an apocalyptic number.

It is an amenable number.

78040793 is a deficient number, since it is larger than the sum of its proper divisors (1).

78040793 is an equidigital number, since it uses as much as digits as its factorization.

78040793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 78040793 is about 8834.0700133064. The cubic root of 78040793 is about 427.3403400458.

The spelling of 78040793 in words is "seventy-eight million, forty thousand, seven hundred ninety-three".