1930200661 has 2 divisors, whose sum is σ = 1930200662. Its totient is φ = 1930200660.

The previous prime is 1930200611. The next prime is 1930200691. The reversal of 1930200661 is 1660020391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1245384100 + 684816561 = 35290^2 + 26169^2 .

It is a cyclic number.

It is not a de Polignac number, because 1930200661 - 2²¹ = 1928103509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1930200611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 965100330 + 965100331.

It is an arithmetic number, because the mean of its divisors is an integer number (965100331).

Almost surely, 2^1930200661 is an apocalyptic number.

It is an amenable number.

1930200661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1930200661 is an equidigital number, since it uses as much as digits as its factorization.

1930200661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1930200661 is about 43934.0489939181. The cubic root of 1930200661 is about 1245.0902148032.

The spelling of 1930200661 in words is "one billion, nine hundred thirty million, two hundred thousand, six hundred sixty-one".