190897489 has 2 divisors, whose sum is σ = 190897490. Its totient is φ = 190897488.

The previous prime is 190897481. The next prime is 190897501. The reversal of 190897489 is 984798091.

190897489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190854225 + 43264 = 13815^2 + 208^2 .

It is a cyclic number.

It is not a de Polignac number, because 190897489 - 2³ = 190897481 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (190897481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95448744 + 95448745.

It is an arithmetic number, because the mean of its divisors is an integer number (95448745).

Almost surely, 2^190897489 is an apocalyptic number.

It is an amenable number.

190897489 is a deficient number, since it is larger than the sum of its proper divisors (1).

190897489 is an equidigital number, since it uses as much as digits as its factorization.

190897489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The square root of 190897489 is about 13816.5657455100. The cubic root of 190897489 is about 575.7934744172.

The spelling of 190897489 in words is "one hundred ninety million, eight hundred ninety-seven thousand, four hundred eighty-nine".