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190486991 is a prime number
BaseRepresentation
bin10110101101010…
…01100111001111
3111021102202000202
423112221213033
5342231040431
630522444115
74502053442
oct1326514717
9437382022
10190486991
1198585772
125396363b
13306062c6
141b427659
1511aca8cb
hexb5a99cf

190486991 has 2 divisors, whose sum is σ = 190486992. Its totient is φ = 190486990.

The previous prime is 190486973. The next prime is 190487029. The reversal of 190486991 is 199684091.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 190486991 - 26 = 190486927 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 (190486931) 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, 95243495 + 95243496.

It is an arithmetic number, because the mean of its divisors is an integer number (95243496).

Almost surely, 2190486991 is an apocalyptic number.

190486991 is a deficient number, since it is larger than the sum of its proper divisors (1).

190486991 is an equidigital number, since it uses as much as digits as its factorization.

190486991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 190486991 is about 13801.7024674494. The cubic root of 190486991 is about 575.3804574718.

The spelling of 190486991 in words is "one hundred ninety million, four hundred eighty-six thousand, nine hundred ninety-one".