2009358947 has 2 divisors, whose sum is σ = 2009358948. Its totient is φ = 2009358946.

The previous prime is 2009358829. The next prime is 2009358991. The reversal of 2009358947 is 7498539002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2009358947 - 2¹⁶ = 2009293411 is a prime.

It is not a weakly prime, because it can be changed into another prime (2009358047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004679473 + 1004679474.

It is an arithmetic number, because the mean of its divisors is an integer number (1004679474).

Almost surely, 2^2009358947 is an apocalyptic number.

2009358947 is a deficient number, since it is larger than the sum of its proper divisors (1).

2009358947 is an equidigital number, since it uses as much as digits as its factorization.

2009358947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 2009358947 is about 44825.8736334274. The cubic root of 2009358947 is about 1261.8832481070.

The spelling of 2009358947 in words is "two billion, nine million, three hundred fifty-eight thousand, nine hundred forty-seven".