190603661 has 2 divisors, whose sum is σ = 190603662. Its totient is φ = 190603660.

The previous prime is 190603577. The next prime is 190603697. The reversal of 190603661 is 166306091.

190603661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177715561 + 12888100 = 13331^2 + 3590^2 .

It is a cyclic number.

It is not a de Polignac number, because 190603661 - 2¹⁴ = 190587277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190608661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95301830 + 95301831.

It is an arithmetic number, because the mean of its divisors is an integer number (95301831).

Almost surely, 2^190603661 is an apocalyptic number.

It is an amenable number.

190603661 is a deficient number, since it is larger than the sum of its proper divisors (1).

190603661 is an equidigital number, since it uses as much as digits as its factorization.

190603661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 190603661 is about 13805.9284729423. The cubic root of 190603661 is about 575.4979037027.

The spelling of 190603661 in words is "one hundred ninety million, six hundred three thousand, six hundred sixty-one".