197782104529 has 9 divisors (see below), whose sum is σ = 202742406811. Its totient is φ = 192940361680.

The previous prime is 197782104511. The next prime is 197782104601. The reversal of 197782104529 is 925401287791.

The square root of 197782104529 is 444727.

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

It can be written as a sum of positive squares in only one way, i.e., 9530250129 + 188251854400 = 97623^2 + 433880^2 .

It is not a de Polignac number, because 197782104529 - 2²³ = 197773715921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 197782104529.

It is not an unprimeable number, because it can be changed into a prime (197782104029) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 18228384 + ... + 18239230.

Almost surely, 2^197782104529 is an apocalyptic number.

197782104529 is the 444727-th square number.

197782104529 is the 222364-th centered octagonal number.

It is an amenable number.

197782104529 is a deficient number, since it is larger than the sum of its proper divisors (4960302282).

197782104529 is an frugal number, since it uses more digits than its factorization.

197782104529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21776 (or 10888 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 55.

The spelling of 197782104529 in words is "one hundred ninety-seven billion, seven hundred eighty-two million, one hundred four thousand, five hundred twenty-nine".