9473378521 has 2 divisors, whose sum is σ = 9473378522. Its totient is φ = 9473378520.

The previous prime is 9473378501. The next prime is 9473378531. The reversal of 9473378521 is 1258733749.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6051128521 + 3422250000 = 77789^2 + 58500^2 .

It is a cyclic number.

It is not a de Polignac number, because 9473378521 - 2¹⁵ = 9473345753 is a prime.

It is not a weakly prime, because it can be changed into another prime (9473378501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4736689260 + 4736689261.

It is an arithmetic number, because the mean of its divisors is an integer number (4736689261).

Almost surely, 2^9473378521 is an apocalyptic number.

It is an amenable number.

9473378521 is a deficient number, since it is larger than the sum of its proper divisors (1).

9473378521 is an equidigital number, since it uses as much as digits as its factorization.

9473378521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 49.

The square root of 9473378521 is about 97331.2823351259. The cubic root of 9473378521 is about 2115.9316274930.

The spelling of 9473378521 in words is "nine billion, four hundred seventy-three million, three hundred seventy-eight thousand, five hundred twenty-one".