2549020387 has 4 divisors (see below), whose sum is σ = 2579731560. Its totient is φ = 2518309216.

The previous prime is 2549020381. The next prime is 2549020403. The reversal of 2549020387 is 7830209452.

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-2549020387 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2549020381) 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, 15355462 + ... + 15355627.

It is an arithmetic number, because the mean of its divisors is an integer number (644932890).

Almost surely, 2^2549020387 is an apocalyptic number.

2549020387 is a deficient number, since it is larger than the sum of its proper divisors (30711173).

2549020387 is an equidigital number, since it uses as much as digits as its factorization.

2549020387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30711172.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 2549020387 is about 50487.8241460255. The cubic root of 2549020387 is about 1366.0222386404.

The spelling of 2549020387 in words is "two billion, five hundred forty-nine million, twenty thousand, three hundred eighty-seven".