306736972989893 has 2 divisors, whose sum is σ = 306736972989894. Its totient is φ = 306736972989892.

The previous prime is 306736972989767. The next prime is 306736972989947. The reversal of 306736972989893 is 398989279637603.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252058076537569 + 54678896452324 = 15876337^2 + 7394518^2 .

It is a cyclic number.

It is not a de Polignac number, because 306736972989893 - 2¹⁰ = 306736972988869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 306736972989799 and 306736972989808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (306736972986893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153368486494946 + 153368486494947.

It is an arithmetic number, because the mean of its divisors is an integer number (153368486494947).

Almost surely, 2^{306736972989893} is an apocalyptic number.

It is an amenable number.

306736972989893 is a deficient number, since it is larger than the sum of its proper divisors (1).

306736972989893 is an equidigital number, since it uses as much as digits as its factorization.

306736972989893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39998375424, while the sum is 89.

The spelling of 306736972989893 in words is "three hundred six trillion, seven hundred thirty-six billion, nine hundred seventy-two million, nine hundred eighty-nine thousand, eight hundred ninety-three".