1949584881 has 4 divisors (see below), whose sum is σ = 2599446512. Its totient is φ = 1299723252.

The previous prime is 1949584873. The next prime is 1949584907. The reversal of 1949584881 is 1884859491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1949584881 - 2³ = 1949584873 is a prime.

It is a super-2 number, since 2×1949584881² = 7601762416447568322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1949584801) 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, 324930811 + ... + 324930816.

It is an arithmetic number, because the mean of its divisors is an integer number (649861628).

Almost surely, 2^1949584881 is an apocalyptic number.

It is an amenable number.

1949584881 is a deficient number, since it is larger than the sum of its proper divisors (649861631).

1949584881 is an equidigital number, since it uses as much as digits as its factorization.

1949584881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649861630.

The product of its digits is 3317760, while the sum is 57.

The square root of 1949584881 is about 44154.1037843596. The cubic root of 1949584881 is about 1249.2443178610.

The spelling of 1949584881 in words is "one billion, nine hundred forty-nine million, five hundred eighty-four thousand, eight hundred eighty-one".