309470089 has 2 divisors, whose sum is σ = 309470090. Its totient is φ = 309470088.

The previous prime is 309470071. The next prime is 309470093. The reversal of 309470089 is 980074903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291897225 + 17572864 = 17085^2 + 4192^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-309470089 is a prime.

It is not a weakly prime, because it can be changed into another prime (309470059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154735044 + 154735045.

It is an arithmetic number, because the mean of its divisors is an integer number (154735045).

Almost surely, 2^309470089 is an apocalyptic number.

It is an amenable number.

309470089 is a deficient number, since it is larger than the sum of its proper divisors (1).

309470089 is an equidigital number, since it uses as much as digits as its factorization.

309470089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 309470089 is about 17591.7619640558. The cubic root of 309470089 is about 676.4040925419.

The spelling of 309470089 in words is "three hundred nine million, four hundred seventy thousand, eighty-nine".