28733031493 has 2 divisors, whose sum is σ = 28733031494. Its totient is φ = 28733031492.

The previous prime is 28733031463. The next prime is 28733031499. The reversal of 28733031493 is 39413033782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23679669924 + 5053361569 = 153882^2 + 71087^2 .

It is a cyclic number.

It is not a de Polignac number, because 28733031493 - 2¹³ = 28733023301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28733031499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14366515746 + 14366515747.

It is an arithmetic number, because the mean of its divisors is an integer number (14366515747).

Almost surely, 2^28733031493 is an apocalyptic number.

It is an amenable number.

28733031493 is a deficient number, since it is larger than the sum of its proper divisors (1).

28733031493 is an equidigital number, since it uses as much as digits as its factorization.

28733031493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 43.

The spelling of 28733031493 in words is "twenty-eight billion, seven hundred thirty-three million, thirty-one thousand, four hundred ninety-three".