1194677764921 has 2 divisors, whose sum is σ = 1194677764922. Its totient is φ = 1194677764920.

The previous prime is 1194677764901. The next prime is 1194677764933. The reversal of 1194677764921 is 1294677764911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 877573630521 + 317104134400 = 936789^2 + 563120^2 .

It is a cyclic number.

It is not a de Polignac number, because 1194677764921 - 2²⁷ = 1194543547193 is a prime.

It is a super-2 number, since 2×1194677764921² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1194677764901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 597338882460 + 597338882461.

It is an arithmetic number, because the mean of its divisors is an integer number (597338882461).

Almost surely, 2^{1194677764921} is an apocalyptic number.

It is an amenable number.

1194677764921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1194677764921 is an equidigital number, since it uses as much as digits as its factorization.

1194677764921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32006016, while the sum is 64.

The spelling of 1194677764921 in words is "one trillion, one hundred ninety-four billion, six hundred seventy-seven million, seven hundred sixty-four thousand, nine hundred twenty-one".