197049581 has 4 divisors (see below), whose sum is σ = 200279964. Its totient is φ = 193819200.

The previous prime is 197049571. The next prime is 197049617. The reversal of 197049581 is 185940791.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42445225 + 154604356 = 6515^2 + 12434^2 .

It is a cyclic number.

It is not a de Polignac number, because 197049581 - 2¹⁴ = 197033197 is a prime.

It is a super-2 number, since 2×197049581² = 77657074744551122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197049511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1615100 + ... + 1615221.

It is an arithmetic number, because the mean of its divisors is an integer number (50069991).

Almost surely, 2^197049581 is an apocalyptic number.

It is an amenable number.

197049581 is a deficient number, since it is larger than the sum of its proper divisors (3230383).

197049581 is an equidigital number, since it uses as much as digits as its factorization.

197049581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3230382.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 197049581 is about 14037.4349864924. The cubic root of 197049581 is about 581.9135972709.

The spelling of 197049581 in words is "one hundred ninety-seven million, forty-nine thousand, five hundred eighty-one".