197043649 has 8 divisors (see below), whose sum is σ = 215066592. Its totient is φ = 179039040.

The previous prime is 197043641. The next prime is 197043653. The reversal of 197043649 is 946340791.

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

It is a cyclic number.

It is not a de Polignac number, because 197043649 - 2³ = 197043641 is a prime.

It is a super-2 number, since 2×197043649² = 77652399222470402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197043641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28002 + ... + 34324.

It is an arithmetic number, because the mean of its divisors is an integer number (26883324).

Almost surely, 2^197043649 is an apocalyptic number.

It is an amenable number.

197043649 is a deficient number, since it is larger than the sum of its proper divisors (18022943).

197043649 is a wasteful number, since it uses less digits than its factorization.

197043649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9167.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 197043649 is about 14037.2236927392. The cubic root of 197043649 is about 581.9077578843.

The spelling of 197043649 in words is "one hundred ninety-seven million, forty-three thousand, six hundred forty-nine".