78173363 has 2 divisors, whose sum is σ = 78173364. Its totient is φ = 78173362.

The previous prime is 78173281. The next prime is 78173377. The reversal of 78173363 is 36337187.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78173363 - 2²⁰ = 77124787 is a prime.

It is a super-2 number, since 2×78173363² = 12222149365459538, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78173393) 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, 39086681 + 39086682.

It is an arithmetic number, because the mean of its divisors is an integer number (39086682).

Almost surely, 2^78173363 is an apocalyptic number.

78173363 is a deficient number, since it is larger than the sum of its proper divisors (1).

78173363 is an equidigital number, since it uses as much as digits as its factorization.

78173363 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 38.

The square root of 78173363 is about 8841.5701659830. The cubic root of 78173363 is about 427.5821813440.

The spelling of 78173363 in words is "seventy-eight million, one hundred seventy-three thousand, three hundred sixty-three".