2009451149 has 2 divisors, whose sum is σ = 2009451150. Its totient is φ = 2009451148.

The previous prime is 2009451109. The next prime is 2009451173. The reversal of 2009451149 is 9411549002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1607448649 + 402002500 = 40093^2 + 20050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2009451149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2009451109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004725574 + 1004725575.

It is an arithmetic number, because the mean of its divisors is an integer number (1004725575).

Almost surely, 2^2009451149 is an apocalyptic number.

It is an amenable number.

2009451149 is a deficient number, since it is larger than the sum of its proper divisors (1).

2009451149 is an equidigital number, since it uses as much as digits as its factorization.

2009451149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 2009451149 is about 44826.9020678431. The cubic root of 2009451149 is about 1261.9025488530.

The spelling of 2009451149 in words is "two billion, nine million, four hundred fifty-one thousand, one hundred forty-nine".