1985170103 has 32 divisors (see below), whose sum is σ = 2480432640. Its totient is φ = 1550845440.

The previous prime is 1985170097. The next prime is 1985170111. The reversal of 1985170103 is 3010715891.

It is a cyclic number.

It is not a de Polignac number, because 1985170103 - 2⁶ = 1985170039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985170123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 395576 + ... + 400562.

It is an arithmetic number, because the mean of its divisors is an integer number (77513520).

Almost surely, 2^1985170103 is an apocalyptic number.

1985170103 is a deficient number, since it is larger than the sum of its proper divisors (495262537).

1985170103 is a wasteful number, since it uses less digits than its factorization.

1985170103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5127.

The product of its (nonzero) digits is 7560, while the sum is 35.

The square root of 1985170103 is about 44555.2477605052. The cubic root of 1985170103 is about 1256.7992378752.

Adding to 1985170103 its reverse (3010715891), we get a palindrome (4995885994).

The spelling of 1985170103 in words is "one billion, nine hundred eighty-five million, one hundred seventy thousand, one hundred three".