307711421 has 2 divisors, whose sum is σ = 307711422. Its totient is φ = 307711420.

The previous prime is 307711381. The next prime is 307711423. The reversal of 307711421 is 124117703.

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., 277888900 + 29822521 = 16670^2 + 5461^2 .

It is an emirp because it is prime and its reverse (124117703) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-307711421 is a prime.

It is a super-2 number, since 2×307711421² = 189372637227678482, which contains 22 as substring.

Together with 307711423, 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 (307711423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153855710 + 153855711.

It is an arithmetic number, because the mean of its divisors is an integer number (153855711).

Almost surely, 2^307711421 is an apocalyptic number.

It is an amenable number.

307711421 is a deficient number, since it is larger than the sum of its proper divisors (1).

307711421 is an equidigital number, since it uses as much as digits as its factorization.

307711421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 307711421 is about 17541.7051907732. The cubic root of 307711421 is about 675.1203596987.

The spelling of 307711421 in words is "three hundred seven million, seven hundred eleven thousand, four hundred twenty-one".