197076661 has 2 divisors, whose sum is σ = 197076662. Its totient is φ = 197076660.

The previous prime is 197076647. The next prime is 197076667. The reversal of 197076661 is 166670791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145323025 + 51753636 = 12055^2 + 7194^2 .

It is a cyclic number.

It is not a de Polignac number, because 197076661 - 2⁵ = 197076629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197076667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98538330 + 98538331.

It is an arithmetic number, because the mean of its divisors is an integer number (98538331).

Almost surely, 2^197076661 is an apocalyptic number.

It is an amenable number.

197076661 is a deficient number, since it is larger than the sum of its proper divisors (1).

197076661 is an equidigital number, since it uses as much as digits as its factorization.

197076661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 197076661 is about 14038.3995170390. The cubic root of 197076661 is about 581.9402529961.

The spelling of 197076661 in words is "one hundred ninety-seven million, seventy-six thousand, six hundred sixty-one".