190649 has 2 divisors, whose sum is σ = 190650. Its totient is φ = 190648.

The previous prime is 190639. The next prime is 190657. The reversal of 190649 is 946091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135424 + 55225 = 368^2 + 235^2 .

It is an emirp because it is prime and its reverse (946091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 190649 - 2⁴ = 190633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (190639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95324 + 95325.

It is an arithmetic number, because the mean of its divisors is an integer number (95325).

2¹⁹⁰⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

190649 is a deficient number, since it is larger than the sum of its proper divisors (1).

190649 is an equidigital number, since it uses as much as digits as its factorization.

190649 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 29.

The square root of 190649 is about 436.6337137693. The cubic root of 190649 is about 57.5543531422.

The spelling of 190649 in words is "one hundred ninety thousand, six hundred forty-nine".