1985700547 has 2 divisors, whose sum is σ = 1985700548. Its totient is φ = 1985700546.

The previous prime is 1985700527. The next prime is 1985700551. The reversal of 1985700547 is 7450075891.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1985700547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1985700497 and 1985700506.

It is not a weakly prime, because it can be changed into another prime (1985700527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992850273 + 992850274.

It is an arithmetic number, because the mean of its divisors is an integer number (992850274).

Almost surely, 2^1985700547 is an apocalyptic number.

1985700547 is a deficient number, since it is larger than the sum of its proper divisors (1).

1985700547 is an equidigital number, since it uses as much as digits as its factorization.

1985700547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 352800, while the sum is 46.

The square root of 1985700547 is about 44561.2000175040. The cubic root of 1985700547 is about 1256.9111682071.

The spelling of 1985700547 in words is "one billion, nine hundred eighty-five million, seven hundred thousand, five hundred forty-seven".