7323136981 has 2 divisors, whose sum is σ = 7323136982. Its totient is φ = 7323136980.

The previous prime is 7323136949. The next prime is 7323137027. The reversal of 7323136981 is 1896313237.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4728762756 + 2594374225 = 68766^2 + 50935^2 .

It is a cyclic number.

It is not a de Polignac number, because 7323136981 - 2⁵ = 7323136949 is a prime.

It is a super-2 number, since 2×7323136981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7323136081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3661568490 + 3661568491.

It is an arithmetic number, because the mean of its divisors is an integer number (3661568491).

Almost surely, 2^7323136981 is an apocalyptic number.

It is an amenable number.

7323136981 is a deficient number, since it is larger than the sum of its proper divisors (1).

7323136981 is an equidigital number, since it uses as much as digits as its factorization.

7323136981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The square root of 7323136981 is about 85575.3292777772. The cubic root of 7323136981 is about 1941.9247009806.

The spelling of 7323136981 in words is "seven billion, three hundred twenty-three million, one hundred thirty-six thousand, nine hundred eighty-one".