1984872997 has 2 divisors, whose sum is σ = 1984872998. Its totient is φ = 1984872996.

The previous prime is 1984872959. The next prime is 1984873003. The reversal of 1984872997 is 7992784891.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1520298081 + 464574916 = 38991^2 + 21554^2 .

It is a cyclic number.

It is not a de Polignac number, because 1984872997 - 2¹⁵ = 1984840229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1984872917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992436498 + 992436499.

It is an arithmetic number, because the mean of its divisors is an integer number (992436499).

Almost surely, 2^1984872997 is an apocalyptic number.

It is an amenable number.

1984872997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1984872997 is an equidigital number, since it uses as much as digits as its factorization.

1984872997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18289152, while the sum is 64.

The square root of 1984872997 is about 44551.9135054826. The cubic root of 1984872997 is about 1256.7365360739.

The spelling of 1984872997 in words is "one billion, nine hundred eighty-four million, eight hundred seventy-two thousand, nine hundred ninety-seven".