78190223 has 4 divisors (see below), whose sum is σ = 78317160. Its totient is φ = 78063288.

The previous prime is 78190201. The next prime is 78190249. The reversal of 78190223 is 32209187.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78190223 - 2¹² = 78186127 is a prime.

It is a super-2 number, since 2×78190223² = 12227421945579458, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78190223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78190253) 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, 62540 + ... + 63777.

It is an arithmetic number, because the mean of its divisors is an integer number (19579290).

Almost surely, 2^78190223 is an apocalyptic number.

78190223 is a deficient number, since it is larger than the sum of its proper divisors (126937).

78190223 is a wasteful number, since it uses less digits than its factorization.

78190223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126936.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 78190223 is about 8842.5235651368. The cubic root of 78190223 is about 427.6129186569.

The spelling of 78190223 in words is "seventy-eight million, one hundred ninety thousand, two hundred twenty-three".