78753893 has 2 divisors, whose sum is σ = 78753894. Its totient is φ = 78753892.

The previous prime is 78753833. The next prime is 78753923. The reversal of 78753893 is 39835787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52519009 + 26234884 = 7247^2 + 5122^2 .

It is an emirp because it is prime and its reverse (39835787) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78753893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78753823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39376946 + 39376947.

It is an arithmetic number, because the mean of its divisors is an integer number (39376947).

Almost surely, 2^78753893 is an apocalyptic number.

It is an amenable number.

78753893 is a deficient number, since it is larger than the sum of its proper divisors (1).

78753893 is an equidigital number, since it uses as much as digits as its factorization.

78753893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 50.

The square root of 78753893 is about 8874.3390176396. The cubic root of 78753893 is about 428.6380071115.

The spelling of 78753893 in words is "seventy-eight million, seven hundred fifty-three thousand, eight hundred ninety-three".