195721694 has 12 divisors (see below), whose sum is σ = 335612664. Its totient is φ = 83858292.

The previous prime is 195721661. The next prime is 195721709. The reversal of 195721694 is 496127591.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50477 + ... + 54215.

It is an arithmetic number, because the mean of its divisors is an integer number (27967722).

Almost surely, 2^195721694 is an apocalyptic number.

195721694 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

195721694 is a deficient number, since it is larger than the sum of its proper divisors (139890970).

195721694 is an frugal number, since it uses more digits than its factorization.

195721694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7487 (or 3748 counting only the distinct ones).

The product of its digits is 136080, while the sum is 44.

The square root of 195721694 is about 13990.0569691478. The cubic root of 195721694 is about 580.6035077631.

The spelling of 195721694 in words is "one hundred ninety-five million, seven hundred twenty-one thousand, six hundred ninety-four".