1909249413 has 16 divisors (see below), whose sum is σ = 2715996096. Its totient is φ = 1188811520.

The previous prime is 1909249411. The next prime is 1909249439. The reversal of 1909249413 is 3149429091.

It is a cyclic number.

It is not a de Polignac number, because 1909249413 - 2¹ = 1909249411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1909249411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136206 + ... + 149567.

It is an arithmetic number, because the mean of its divisors is an integer number (169749756).

Almost surely, 2^1909249413 is an apocalyptic number.

It is an amenable number.

1909249413 is a deficient number, since it is larger than the sum of its proper divisors (806746683).

1909249413 is a wasteful number, since it uses less digits than its factorization.

1909249413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285924.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 1909249413 is about 43694.9586680203. The cubic root of 1909249413 is about 1240.5688971688.

The spelling of 1909249413 in words is "one billion, nine hundred nine million, two hundred forty-nine thousand, four hundred thirteen".