193970839 has 2 divisors, whose sum is σ = 193970840. Its totient is φ = 193970838.

The previous prime is 193970827. The next prime is 193970849. The reversal of 193970839 is 938079391.

It is a strong prime.

It is an emirp because it is prime and its reverse (938079391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 193970839 - 2²⁵ = 160416407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 193970792 and 193970801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193970849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96985419 + 96985420.

It is an arithmetic number, because the mean of its divisors is an integer number (96985420).

Almost surely, 2^193970839 is an apocalyptic number.

193970839 is a deficient number, since it is larger than the sum of its proper divisors (1).

193970839 is an equidigital number, since it uses as much as digits as its factorization.

193970839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 49.

The square root of 193970839 is about 13927.3414189500. The cubic root of 193970839 is about 578.8670302763.

The spelling of 193970839 in words is "one hundred ninety-three million, nine hundred seventy thousand, eight hundred thirty-nine".