196390791 has 16 divisors (see below), whose sum is σ = 292908000. Its totient is φ = 130045824.

The previous prime is 196390787. The next prime is 196390801. The reversal of 196390791 is 197093691.

196390791 is a `hidden beast` number, since 1 + 9 + 639 + 0 + 7 + 9 + 1 = 666.

It is not a de Polignac number, because 196390791 - 2² = 196390787 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196390991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20386 + ... + 28431.

It is an arithmetic number, because the mean of its divisors is an integer number (18306750).

Almost surely, 2^196390791 is an apocalyptic number.

196390791 is a deficient number, since it is larger than the sum of its proper divisors (96517209).

196390791 is a wasteful number, since it uses less digits than its factorization.

196390791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48975 (or 48969 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 45.

The square root of 196390791 is about 14013.9498714674. The cubic root of 196390791 is about 581.2643750867.

The spelling of 196390791 in words is "one hundred ninety-six million, three hundred ninety thousand, seven hundred ninety-one".