397583529661 has 2 divisors, whose sum is σ = 397583529662. Its totient is φ = 397583529660.

The previous prime is 397583529649. The next prime is 397583529731. The reversal of 397583529661 is 166925385793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217803289636 + 179780240025 = 466694^2 + 424005^2 .

It is a cyclic number.

It is not a de Polignac number, because 397583529661 - 2¹³ = 397583521469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 397583529593 and 397583529602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397583529631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198791764830 + 198791764831.

It is an arithmetic number, because the mean of its divisors is an integer number (198791764831).

Almost surely, 2^397583529661 is an apocalyptic number.

It is an amenable number.

397583529661 is a deficient number, since it is larger than the sum of its proper divisors (1).

397583529661 is an equidigital number, since it uses as much as digits as its factorization.

397583529661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73483200, while the sum is 64.

The spelling of 397583529661 in words is "three hundred ninety-seven billion, five hundred eighty-three million, five hundred twenty-nine thousand, six hundred sixty-one".