307405421 has 2 divisors, whose sum is σ = 307405422. Its totient is φ = 307405420.

The previous prime is 307405391. The next prime is 307405433. The reversal of 307405421 is 124504703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224850025 + 82555396 = 14995^2 + 9086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-307405421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (307405451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153702710 + 153702711.

It is an arithmetic number, because the mean of its divisors is an integer number (153702711).

Almost surely, 2^307405421 is an apocalyptic number.

It is an amenable number.

307405421 is a deficient number, since it is larger than the sum of its proper divisors (1).

307405421 is an equidigital number, since it uses as much as digits as its factorization.

307405421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 307405421 is about 17532.9809501978. The cubic root of 307405421 is about 674.8964969785.

The spelling of 307405421 in words is "three hundred seven million, four hundred five thousand, four hundred twenty-one".