1949378249 has 16 divisors (see below), whose sum is σ = 2400316800. Its totient is φ = 1541669760.

The previous prime is 1949378243. The next prime is 1949378261. The reversal of 1949378249 is 9428739491.

It is a cyclic number.

It is not a de Polignac number, because 1949378249 - 2²⁸ = 1680942793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1949378194 and 1949378203.

It is not an unprimeable number, because it can be changed into a prime (1949378243) 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, 310754 + ... + 316964.

It is an arithmetic number, because the mean of its divisors is an integer number (150019800).

Almost surely, 2^1949378249 is an apocalyptic number.

It is an amenable number.

1949378249 is a deficient number, since it is larger than the sum of its proper divisors (450938551).

1949378249 is a wasteful number, since it uses less digits than its factorization.

1949378249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9680.

The product of its digits is 3919104, while the sum is 56.

The square root of 1949378249 is about 44151.7638266015. The cubic root of 1949378249 is about 1249.2001814614.

The spelling of 1949378249 in words is "one billion, nine hundred forty-nine million, three hundred seventy-eight thousand, two hundred forty-nine".