197924661 has 48 divisors (see below), whose sum is σ = 329414400. Its totient is φ = 117311040.

The previous prime is 197924647. The next prime is 197924663. The reversal of 197924661 is 166429791.

It is a de Polignac number, because none of the positive numbers 2^k-197924661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197924663) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 152905 + ... + 154193.

It is an arithmetic number, because the mean of its divisors is an integer number (6862800).

Almost surely, 2^197924661 is an apocalyptic number.

197924661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

197924661 is a deficient number, since it is larger than the sum of its proper divisors (131489739).

197924661 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (197924660) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (1350).

197924661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367 (or 1350 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 197924661 is about 14068.5699699721. The cubic root of 197924661 is about 582.7737344345.

The spelling of 197924661 in words is "one hundred ninety-seven million, nine hundred twenty-four thousand, six hundred sixty-one".