7478963189 has 4 divisors (see below), whose sum is σ = 7620075756. Its totient is φ = 7337850624.

The previous prime is 7478963111. The next prime is 7478963213. The reversal of 7478963189 is 9813698747.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4876228900 + 2602734289 = 69830^2 + 51017^2 .

It is a cyclic number.

It is not a de Polignac number, because 7478963189 - 2²⁸ = 7210527733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7478963389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70556204 + ... + 70556309.

It is an arithmetic number, because the mean of its divisors is an integer number (1905018939).

Almost surely, 2^7478963189 is an apocalyptic number.

It is an amenable number.

7478963189 is a deficient number, since it is larger than the sum of its proper divisors (141112567).

7478963189 is a wasteful number, since it uses less digits than its factorization.

7478963189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141112566.

The product of its digits is 18289152, while the sum is 62.

The square root of 7478963189 is about 86480.9990055619. Note that the first 3 decimals coincide. The cubic root of 7478963189 is about 1955.6019661063.

The spelling of 7478963189 in words is "seven billion, four hundred seventy-eight million, nine hundred sixty-three thousand, one hundred eighty-nine".