78250793 has 2 divisors, whose sum is σ = 78250794. Its totient is φ = 78250792.

The previous prime is 78250771. The next prime is 78250859. The reversal of 78250793 is 39705287.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61669609 + 16581184 = 7853^2 + 4072^2 .

It is an emirp because it is prime and its reverse (39705287) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78250793 - 2⁸ = 78250537 is a prime.

It is a super-2 number, since 2×78250793² = 12246373210257698, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78250793.

It is not a weakly prime, because it can be changed into another prime (78250693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39125396 + 39125397.

It is an arithmetic number, because the mean of its divisors is an integer number (39125397).

Almost surely, 2^78250793 is an apocalyptic number.

It is an amenable number.

78250793 is a deficient number, since it is larger than the sum of its proper divisors (1).

78250793 is an equidigital number, since it uses as much as digits as its factorization.

78250793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 78250793 is about 8845.9478293736. The cubic root of 78250793 is about 427.7233068377.

The spelling of 78250793 in words is "seventy-eight million, two hundred fifty thousand, seven hundred ninety-three".