8307193421 has 2 divisors, whose sum is σ = 8307193422. Its totient is φ = 8307193420.

The previous prime is 8307193397. The next prime is 8307193423. The reversal of 8307193421 is 1243917038.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7347061225 + 960132196 = 85715^2 + 30986^2 .

It is a cyclic number.

It is not a de Polignac number, because 8307193421 - 2¹⁸ = 8306931277 is a prime.

Together with 8307193423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8307193423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4153596710 + 4153596711.

It is an arithmetic number, because the mean of its divisors is an integer number (4153596711).

Almost surely, 2^8307193421 is an apocalyptic number.

It is an amenable number.

8307193421 is a deficient number, since it is larger than the sum of its proper divisors (1).

8307193421 is an equidigital number, since it uses as much as digits as its factorization.

8307193421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 8307193421 is about 91143.8062678973. The cubic root of 8307193421 is about 2025.2786017939.

The spelling of 8307193421 in words is "eight billion, three hundred seven million, one hundred ninety-three thousand, four hundred twenty-one".