3661601197 has 2 divisors, whose sum is σ = 3661601198. Its totient is φ = 3661601196.

The previous prime is 3661601179. The next prime is 3661601249. The reversal of 3661601197 is 7911061663.

Together with previous prime (3661601179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2909415721 + 752185476 = 53939^2 + 27426^2 .

It is a cyclic number.

It is not a de Polignac number, because 3661601197 - 2¹⁵ = 3661568429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3661601497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830800598 + 1830800599.

It is an arithmetic number, because the mean of its divisors is an integer number (1830800599).

Almost surely, 2^3661601197 is an apocalyptic number.

It is an amenable number.

3661601197 is a deficient number, since it is larger than the sum of its proper divisors (1).

3661601197 is an equidigital number, since it uses as much as digits as its factorization.

3661601197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 3661601197 is about 60511.1658869667. The cubic root of 3661601197 is about 1541.3112457521.

The spelling of 3661601197 in words is "three billion, six hundred sixty-one million, six hundred one thousand, one hundred ninety-seven".