28923365797 has 2 divisors, whose sum is σ = 28923365798. Its totient is φ = 28923365796.

The previous prime is 28923365773. The next prime is 28923365833. The reversal of 28923365797 is 79756332982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15715380321 + 13207985476 = 125361^2 + 114926^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28923365797 is a prime.

It is a super-2 number, since 2×28923365797² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28923365897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14461682898 + 14461682899.

It is an arithmetic number, because the mean of its divisors is an integer number (14461682899).

Almost surely, 2^28923365797 is an apocalyptic number.

It is an amenable number.

28923365797 is a deficient number, since it is larger than the sum of its proper divisors (1).

28923365797 is an equidigital number, since it uses as much as digits as its factorization.

28923365797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34292160, while the sum is 61.

The spelling of 28923365797 in words is "twenty-eight billion, nine hundred twenty-three million, three hundred sixty-five thousand, seven hundred ninety-seven".