1790161889 has 2 divisors, whose sum is σ = 1790161890. Its totient is φ = 1790161888.

The previous prime is 1790161831. The next prime is 1790161903. The reversal of 1790161889 is 9881610971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1645681489 + 144480400 = 40567^2 + 12020^2 .

It is a cyclic number.

It is not a de Polignac number, because 1790161889 - 2¹² = 1790157793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1790161189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 895080944 + 895080945.

It is an arithmetic number, because the mean of its divisors is an integer number (895080945).

Almost surely, 2^1790161889 is an apocalyptic number.

It is an amenable number.

1790161889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1790161889 is an equidigital number, since it uses as much as digits as its factorization.

1790161889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 50.

The square root of 1790161889 is about 42310.3047613699. The cubic root of 1790161889 is about 1214.2201499792.

The spelling of 1790161889 in words is "one billion, seven hundred ninety million, one hundred sixty-one thousand, eight hundred eighty-nine".