190000061 has 2 divisors, whose sum is σ = 190000062. Its totient is φ = 190000060.

The previous prime is 190000043. The next prime is 190000067. The reversal of 190000061 is 160000091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189915961 + 84100 = 13781^2 + 290^2 .

It is a cyclic number.

It is not a de Polignac number, because 190000061 - 2¹⁰ = 189999037 is a prime.

It is a super-2 number, since 2×190000061² = 72200046360007442, which contains 22 as substring.

It is a Chen prime.

190000061 is a strobogrammatic number because it is the same when read upside-down.

It is a junction number, because it is equal to n+sod(n) for n = 189999994 and 190000039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190000067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95000030 + 95000031.

It is an arithmetic number, because the mean of its divisors is an integer number (95000031).

Almost surely, 2^190000061 is an apocalyptic number.

It is an amenable number.

190000061 is a deficient number, since it is larger than the sum of its proper divisors (1).

190000061 is an equidigital number, since it uses as much as digits as its factorization.

190000061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 190000061 is about 13784.0509647926. The cubic root of 190000061 is about 574.8897694178.

The spelling of 190000061 in words is "one hundred ninety million, sixty-one", and thus it is an aban number.