195237439 has 2 divisors, whose sum is σ = 195237440. Its totient is φ = 195237438.

The previous prime is 195237347. The next prime is 195237463. The reversal of 195237439 is 934732591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195237439 - 2⁷ = 195237311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 195237395 and 195237404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195237139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97618719 + 97618720.

It is an arithmetic number, because the mean of its divisors is an integer number (97618720).

Almost surely, 2^195237439 is an apocalyptic number.

195237439 is a deficient number, since it is larger than the sum of its proper divisors (1).

195237439 is an equidigital number, since it uses as much as digits as its factorization.

195237439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 43.

The square root of 195237439 is about 13972.7391373345. The cubic root of 195237439 is about 580.1242688542.

It can be divided in two parts, 19523 and 7439, that added together give a palindrome (26962).

The spelling of 195237439 in words is "one hundred ninety-five million, two hundred thirty-seven thousand, four hundred thirty-nine".