1984575797 has 2 divisors, whose sum is σ = 1984575798. Its totient is φ = 1984575796.

The previous prime is 1984575779. The next prime is 1984575823. The reversal of 1984575797 is 7975754891.

It is a happy number.

Together with previous prime (1984575779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1550311876 + 434263921 = 39374^2 + 20839^2 .

It is a cyclic number.

It is not a de Polignac number, because 1984575797 - 2¹⁶ = 1984510261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1984575757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992287898 + 992287899.

It is an arithmetic number, because the mean of its divisors is an integer number (992287899).

Almost surely, 2^1984575797 is an apocalyptic number.

It is an amenable number.

1984575797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1984575797 is an equidigital number, since it uses as much as digits as its factorization.

1984575797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22226400, while the sum is 62.

The square root of 1984575797 is about 44548.5779458784. The cubic root of 1984575797 is about 1256.6738081743.

The spelling of 1984575797 in words is "one billion, nine hundred eighty-four million, five hundred seventy-five thousand, seven hundred ninety-seven".