307890641 has 2 divisors, whose sum is σ = 307890642. Its totient is φ = 307890640.

The previous prime is 307890637. The next prime is 307890643. The reversal of 307890641 is 146098703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 306390016 + 1500625 = 17504^2 + 1225^2 .

It is a cyclic number.

It is not a de Polignac number, because 307890641 - 2² = 307890637 is a prime.

Together with 307890643, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 307890595 and 307890604.

It is not a weakly prime, because it can be changed into another prime (307890643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153945320 + 153945321.

It is an arithmetic number, because the mean of its divisors is an integer number (153945321).

Almost surely, 2^307890641 is an apocalyptic number.

It is an amenable number.

307890641 is a deficient number, since it is larger than the sum of its proper divisors (1).

307890641 is an equidigital number, since it uses as much as digits as its factorization.

307890641 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 307890641 is about 17546.8128445026. The cubic root of 307890641 is about 675.2514041123.

The spelling of 307890641 in words is "three hundred seven million, eight hundred ninety thousand, six hundred forty-one".