78193673 has 2 divisors, whose sum is σ = 78193674. Its totient is φ = 78193672.

The previous prime is 78193631. The next prime is 78193679. The reversal of 78193673 is 37639187.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39790864 + 38402809 = 6308^2 + 6197^2 .

It is a cyclic number.

It is not a de Polignac number, because 78193673 - 2¹⁴ = 78177289 is a prime.

It is a super-2 number, since 2×78193673² = 12228500994461858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78193679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39096836 + 39096837.

It is an arithmetic number, because the mean of its divisors is an integer number (39096837).

Almost surely, 2^78193673 is an apocalyptic number.

It is an amenable number.

78193673 is a deficient number, since it is larger than the sum of its proper divisors (1).

78193673 is an equidigital number, since it uses as much as digits as its factorization.

78193673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 44.

The square root of 78193673 is about 8842.7186430419. The cubic root of 78193673 is about 427.6192077760.

The spelling of 78193673 in words is "seventy-eight million, one hundred ninety-three thousand, six hundred seventy-three".