197929090 has 8 divisors (see below), whose sum is σ = 356272380. Its totient is φ = 79171632.

The previous prime is 197929033. The next prime is 197929091. The reversal of 197929090 is 90929791.

It can be written as a sum of positive squares in 2 ways, for example, as 174319209 + 23609881 = 13203^2 + 4859^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 197929090.

It is not an unprimeable number, because it can be changed into a prime (197929091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9896445 + ... + 9896464.

Almost surely, 2^197929090 is an apocalyptic number.

197929090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197929090 is a deficient number, since it is larger than the sum of its proper divisors (158343290).

197929090 is a wasteful number, since it uses less digits than its factorization.

197929090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19792916.

The product of its (nonzero) digits is 91854, while the sum is 46.

The square root of 197929090 is about 14068.7273767033. The cubic root of 197929090 is about 582.7780813505.

It can be divided in two parts, 19792 and 9090, that added together give a palindrome (28882).

The spelling of 197929090 in words is "one hundred ninety-seven million, nine hundred twenty-nine thousand, ninety".