197749930 has 32 divisors (see below), whose sum is σ = 419927040. Its totient is φ = 65612160.

The previous prime is 197749913. The next prime is 197749931. The reversal of 197749930 is 39947791.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (197749931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43395 + ... + 47734.

It is an arithmetic number, because the mean of its divisors is an integer number (13122720).

Almost surely, 2^197749930 is an apocalyptic number.

197749930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197749930 is an abundant number, since it is smaller than the sum of its proper divisors (222177110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

197749930 is a wasteful number, since it uses less digits than its factorization.

197749930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91174.

The product of its (nonzero) digits is 428652, while the sum is 49.

The square root of 197749930 is about 14062.3586215115. The cubic root of 197749930 is about 582.6021900079.

The spelling of 197749930 in words is "one hundred ninety-seven million, seven hundred forty-nine thousand, nine hundred thirty".