28947663373 has 2 divisors, whose sum is σ = 28947663374. Its totient is φ = 28947663372.

The previous prime is 28947663319. The next prime is 28947663419. The reversal of 28947663373 is 37336674982.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20919861769 + 8027801604 = 144637^2 + 89598^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28947663373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28947666373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14473831686 + 14473831687.

It is an arithmetic number, because the mean of its divisors is an integer number (14473831687).

Almost surely, 2^28947663373 is an apocalyptic number.

It is an amenable number.

28947663373 is a deficient number, since it is larger than the sum of its proper divisors (1).

28947663373 is an equidigital number, since it uses as much as digits as its factorization.

28947663373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27433728, while the sum is 58.

The spelling of 28947663373 in words is "twenty-eight billion, nine hundred forty-seven million, six hundred sixty-three thousand, three hundred seventy-three".