921156918677 has 2 divisors, whose sum is σ = 921156918678. Its totient is φ = 921156918676.

The previous prime is 921156918659. The next prime is 921156918701. The reversal of 921156918677 is 776819651129.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 855354921316 + 65801997361 = 924854^2 + 256519^2 .

It is an emirp because it is prime and its reverse (776819651129) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 921156918677 - 2¹⁴ = 921156902293 is a prime.

It is a super-3 number, since 3×921156918677³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (921156918637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460578459338 + 460578459339.

It is an arithmetic number, because the mean of its divisors is an integer number (460578459339).

Almost surely, 2^921156918677 is an apocalyptic number.

It is an amenable number.

921156918677 is a deficient number, since it is larger than the sum of its proper divisors (1).

921156918677 is an equidigital number, since it uses as much as digits as its factorization.

921156918677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11430720, while the sum is 62.

The spelling of 921156918677 in words is "nine hundred twenty-one billion, one hundred fifty-six million, nine hundred eighteen thousand, six hundred seventy-seven".