306805469 has 2 divisors, whose sum is σ = 306805470. Its totient is φ = 306805468.

The previous prime is 306805423. The next prime is 306805489. The reversal of 306805469 is 964508603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235622500 + 71182969 = 15350^2 + 8437^2 .

It is an emirp because it is prime and its reverse (964508603) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 306805469 - 2²⁴ = 290028253 is a prime.

It is a super-2 number, since 2×306805469² = 188259191616619922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (306805489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153402734 + 153402735.

It is an arithmetic number, because the mean of its divisors is an integer number (153402735).

Almost surely, 2^306805469 is an apocalyptic number.

It is an amenable number.

306805469 is a deficient number, since it is larger than the sum of its proper divisors (1).

306805469 is an equidigital number, since it uses as much as digits as its factorization.

306805469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 306805469 is about 17515.8633529724. The cubic root of 306805469 is about 674.4571540408.

The spelling of 306805469 in words is "three hundred six million, eight hundred five thousand, four hundred sixty-nine".