306134431621 has 2 divisors, whose sum is σ = 306134431622. Its totient is φ = 306134431620.

The previous prime is 306134431583. The next prime is 306134431627. The reversal of 306134431621 is 126134431603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 304190856225 + 1943575396 = 551535^2 + 44086^2 .

It is a cyclic number.

It is not a de Polignac number, because 306134431621 - 2¹⁹ = 306133907333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (306134431627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153067215810 + 153067215811.

It is an arithmetic number, because the mean of its divisors is an integer number (153067215811).

Almost surely, 2^306134431621 is an apocalyptic number.

It is an amenable number.

306134431621 is a deficient number, since it is larger than the sum of its proper divisors (1).

306134431621 is an equidigital number, since it uses as much as digits as its factorization.

306134431621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 34.

The spelling of 306134431621 in words is "three hundred six billion, one hundred thirty-four million, four hundred thirty-one thousand, six hundred twenty-one".