921294776249 has 2 divisors, whose sum is σ = 921294776250. Its totient is φ = 921294776248.

The previous prime is 921294776203. The next prime is 921294776317. The reversal of 921294776249 is 942677492129.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 860701507600 + 60593268649 = 927740^2 + 246157^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-921294776249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 921294776191 and 921294776200.

It is not a weakly prime, because it can be changed into another prime (921294776449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460647388124 + 460647388125.

It is an arithmetic number, because the mean of its divisors is an integer number (460647388125).

Almost surely, 2^921294776249 is an apocalyptic number.

It is an amenable number.

921294776249 is a deficient number, since it is larger than the sum of its proper divisors (1).

921294776249 is an equidigital number, since it uses as much as digits as its factorization.

921294776249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27433728, while the sum is 62.

The spelling of 921294776249 in words is "nine hundred twenty-one billion, two hundred ninety-four million, seven hundred seventy-six thousand, two hundred forty-nine".