903812985 has 96 divisors (see below), whose sum is σ = 1702995840. Its totient is φ = 459260928.

The previous prime is 903812983. The next prime is 903812989. The reversal of 903812985 is 589218309.

It is a happy number.

It is not a de Polignac number, because 903812985 - 2¹ = 903812983 is a prime.

It is a super-2 number, since 2×903812985² = 1633755823709220450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 903812985.

It is not an unprimeable number, because it can be changed into a prime (903812983) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3981442 + ... + 3981668.

It is an arithmetic number, because the mean of its divisors is an integer number (17739540).

Almost surely, 2^903812985 is an apocalyptic number.

It is an amenable number.

903812985 is a deficient number, since it is larger than the sum of its proper divisors (799182855).

903812985 is a wasteful number, since it uses less digits than its factorization.

903812985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 903812985 is about 30063.4825826949. The cubic root of 903812985 is about 966.8509437959.

The spelling of 903812985 in words is "nine hundred three million, eight hundred twelve thousand, nine hundred eighty-five".