197263004449 has 27 divisors (see below), whose sum is σ = 233191482993. Its totient is φ = 166383074088.

The previous prime is 197263004333. The next prime is 197263004473. The reversal of 197263004449 is 944400362791.

The square root of 197263004449 is 444143.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 197263004449 - 2⁷ = 197263004321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (197263004479) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 208302594 + ... + 208303540.

Almost surely, 2^197263004449 is an apocalyptic number.

197263004449 is the 444143-rd square number.

197263004449 is the 222072-nd centered octagonal number.

It is an amenable number.

197263004449 is a deficient number, since it is larger than the sum of its proper divisors (35928478544).

197263004449 is an frugal number, since it uses more digits than its factorization.

197263004449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042 (or 1021 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 49.

Multiplying 197263004449 by its sum of digits (49), we get a square (9665887218001 = 3109001²).

197263004449 divided by its sum of digits (49) gives a square (4025775601 = 63449²).

The spelling of 197263004449 in words is "one hundred ninety-seven billion, two hundred sixty-three million, four thousand, four hundred forty-nine".