193073213 has 4 divisors (see below), whose sum is σ = 199730940. Its totient is φ = 186415488.

The previous prime is 193073173. The next prime is 193073263. The reversal of 193073213 is 312370391.

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

It can be written as a sum of positive squares in 2 ways, for example, as 140612164 + 52461049 = 11858^2 + 7243^2 .

It is a cyclic number.

It is not a de Polignac number, because 193073213 - 2⁶ = 193073149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 6657697 = 193073213 / (1 + 9 + 3 + 0 + 7 + 3 + 2 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193073263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3328820 + ... + 3328877.

It is an arithmetic number, because the mean of its divisors is an integer number (49932735).

Almost surely, 2^193073213 is an apocalyptic number.

It is an amenable number.

193073213 is a deficient number, since it is larger than the sum of its proper divisors (6657727).

193073213 is an equidigital number, since it uses as much as digits as its factorization.

193073213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6657726.

The product of its (nonzero) digits is 3402, while the sum is 29.

The square root of 193073213 is about 13895.0787331343. The cubic root of 193073213 is about 577.9727211417.

The spelling of 193073213 in words is "one hundred ninety-three million, seventy-three thousand, two hundred thirteen".