1309008473 has 2 divisors, whose sum is σ = 1309008474. Its totient is φ = 1309008472.

The previous prime is 1309008457. The next prime is 1309008487. The reversal of 1309008473 is 3748009031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 738371929 + 570636544 = 27173^2 + 23888^2 .

It is a cyclic number.

It is not a de Polignac number, because 1309008473 - 2⁴ = 1309008457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1309008373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 654504236 + 654504237.

It is an arithmetic number, because the mean of its divisors is an integer number (654504237).

Almost surely, 2^1309008473 is an apocalyptic number.

It is an amenable number.

1309008473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1309008473 is an equidigital number, since it uses as much as digits as its factorization.

1309008473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 1309008473 is about 36180.2221248018. Note that the first 3 decimals coincide. The cubic root of 1309008473 is about 1093.9080523574.

The spelling of 1309008473 in words is "one billion, three hundred nine million, eight thousand, four hundred seventy-three".