9983693478 has 16 divisors (see below), whose sum is σ = 21782604096. Its totient is φ = 3025361640.

The previous prime is 9983693449. The next prime is 9983693483. The reversal of 9983693478 is 8743963899.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 151268083 = 9983693478 / (9 + 9 + 8 + 3 + 6 + 9 + 3 + 4 + 7 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75633976 + ... + 75634107.

It is an arithmetic number, because the mean of its divisors is an integer number (1361412756).

Almost surely, 2^9983693478 is an apocalyptic number.

9983693478 is an abundant number, since it is smaller than the sum of its proper divisors (11798910618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9983693478 is a wasteful number, since it uses less digits than its factorization.

9983693478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151268099.

The product of its digits is 70543872, while the sum is 66.

The square root of 9983693478 is about 99918.4341250402. The cubic root of 9983693478 is about 2153.2630083768.

The spelling of 9983693478 in words is "nine billion, nine hundred eighty-three million, six hundred ninety-three thousand, four hundred seventy-eight".