78951193 has 2 divisors, whose sum is σ = 78951194. Its totient is φ = 78951192.

The previous prime is 78951167. The next prime is 78951217. The reversal of 78951193 is 39115987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44997264 + 33953929 = 6708^2 + 5827^2 .

It is a cyclic number.

It is not a de Polignac number, because 78951193 - 2⁵ = 78951161 is a prime.

It is a super-2 number, since 2×78951193² = 12466581752246498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78951133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39475596 + 39475597.

It is an arithmetic number, because the mean of its divisors is an integer number (39475597).

Almost surely, 2^78951193 is an apocalyptic number.

It is an amenable number.

78951193 is a deficient number, since it is larger than the sum of its proper divisors (1).

78951193 is an equidigital number, since it uses as much as digits as its factorization.

78951193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 43.

The square root of 78951193 is about 8885.4483848594. The cubic root of 78951193 is about 428.9956603434.

The spelling of 78951193 in words is "seventy-eight million, nine hundred fifty-one thousand, one hundred ninety-three".