1913902449 has 16 divisors (see below), whose sum is σ = 2715993792. Its totient is φ = 1194651648.

The previous prime is 1913902421. The next prime is 1913902453. The reversal of 1913902449 is 9442093191.

It is not a de Polignac number, because 1913902449 - 2¹² = 1913898353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1913902449.

It is not an unprimeable number, because it can be changed into a prime (1913902409) 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, 87379 + ... + 107064.

It is an arithmetic number, because the mean of its divisors is an integer number (169749612).

Almost surely, 2^1913902449 is an apocalyptic number.

It is an amenable number.

1913902449 is a deficient number, since it is larger than the sum of its proper divisors (802091343).

1913902449 is a wasteful number, since it uses less digits than its factorization.

1913902449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194656.

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

The square root of 1913902449 is about 43748.1708074749. The cubic root of 1913902449 is about 1241.5758773149.

The spelling of 1913902449 in words is "one billion, nine hundred thirteen million, nine hundred two thousand, four hundred forty-nine".