190066397 has 2 divisors, whose sum is σ = 190066398. Its totient is φ = 190066396.

The previous prime is 190066391. The next prime is 190066417. The reversal of 190066397 is 793660091.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184253476 + 5812921 = 13574^2 + 2411^2 .

It is a cyclic number.

It is not a de Polignac number, because 190066397 - 2⁶ = 190066333 is a prime.

It is a super-2 number, since 2×190066397² = 72250470537123218, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190066391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95033198 + 95033199.

It is an arithmetic number, because the mean of its divisors is an integer number (95033199).

Almost surely, 2^190066397 is an apocalyptic number.

It is an amenable number.

190066397 is a deficient number, since it is larger than the sum of its proper divisors (1).

190066397 is an equidigital number, since it uses as much as digits as its factorization.

190066397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 190066397 is about 13786.4570140410. The cubic root of 190066397 is about 574.9566666777.

The spelling of 190066397 in words is "one hundred ninety million, sixty-six thousand, three hundred ninety-seven".