2549473919 has 4 divisors (see below), whose sum is σ = 2551261944. Its totient is φ = 2547685896.

The previous prime is 2549473907. The next prime is 2549473943. The reversal of 2549473919 is 9193749452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2549473919 is a prime.

It is a super-2 number, since 2×2549473919² = 12999634527322437122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2549473319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 891872 + ... + 894725.

It is an arithmetic number, because the mean of its divisors is an integer number (637815486).

Almost surely, 2^2549473919 is an apocalyptic number.

2549473919 is a deficient number, since it is larger than the sum of its proper divisors (1788025).

2549473919 is a wasteful number, since it uses less digits than its factorization.

2549473919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788024.

The product of its digits is 2449440, while the sum is 53.

The square root of 2549473919 is about 50492.3154450259. The cubic root of 2549473919 is about 1366.1032499001.

The spelling of 2549473919 in words is "two billion, five hundred forty-nine million, four hundred seventy-three thousand, nine hundred nineteen".