195496509 has 32 divisors (see below), whose sum is σ = 292819968. Its totient is φ = 115200000.

The previous prime is 195496507. The next prime is 195496513. The reversal of 195496509 is 905694591.

It is not a de Polignac number, because 195496509 - 2¹ = 195496507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195496501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121309 + ... + 122909.

It is an arithmetic number, because the mean of its divisors is an integer number (9150624).

Almost surely, 2^195496509 is an apocalyptic number.

It is an amenable number.

195496509 is a deficient number, since it is larger than the sum of its proper divisors (97323459).

195496509 is a wasteful number, since it uses less digits than its factorization.

195496509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749.

The product of its (nonzero) digits is 437400, while the sum is 48.

The square root of 195496509 is about 13982.0066156471. The cubic root of 195496509 is about 580.3807537565.

The spelling of 195496509 in words is "one hundred ninety-five million, four hundred ninety-six thousand, five hundred nine".