78298193 has 4 divisors (see below), whose sum is σ = 79964160. Its totient is φ = 76632228.

The previous prime is 78298189. The next prime is 78298211. The reversal of 78298193 is 39189287.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39189287 = 797 ⋅49171.

It is a cyclic number.

It is not a de Polignac number, because 78298193 - 2² = 78298189 is a prime.

It is a super-2 number, since 2×78298193² = 12261214054130498, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 1665919 = 78298193 / (7 + 8 + 2 + 9 + 8 + 1 + 9 + 3).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78298123) 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 in 3 ways as a sum of consecutive naturals, for example, 832913 + ... + 833006.

It is an arithmetic number, because the mean of its divisors is an integer number (19991040).

Almost surely, 2^78298193 is an apocalyptic number.

It is an amenable number.

78298193 is a deficient number, since it is larger than the sum of its proper divisors (1665967).

78298193 is a wasteful number, since it uses less digits than its factorization.

78298193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665966.

The product of its digits is 217728, while the sum is 47.

The square root of 78298193 is about 8848.6266165999. The cubic root of 78298193 is about 427.8096531085.

The spelling of 78298193 in words is "seventy-eight million, two hundred ninety-eight thousand, one hundred ninety-three".