1864573489 has 2 divisors, whose sum is σ = 1864573490. Its totient is φ = 1864573488.

The previous prime is 1864573457. The next prime is 1864573541. The reversal of 1864573489 is 9843754681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1603201600 + 261371889 = 40040^2 + 16167^2 .

It is a cyclic number.

It is not a de Polignac number, because 1864573489 - 2⁵ = 1864573457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1864574489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932286744 + 932286745.

It is an arithmetic number, because the mean of its divisors is an integer number (932286745).

Almost surely, 2^1864573489 is an apocalyptic number.

It is an amenable number.

1864573489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1864573489 is an equidigital number, since it uses as much as digits as its factorization.

1864573489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 55.

The square root of 1864573489 is about 43180.7073703060. The cubic root of 1864573489 is about 1230.8160995105.

The spelling of 1864573489 in words is "one billion, eight hundred sixty-four million, five hundred seventy-three thousand, four hundred eighty-nine".