1949833681 has 8 divisors (see below), whose sum is σ = 2016529920. Its totient is φ = 1884187968.

The previous prime is 1949833673. The next prime is 1949833687. The reversal of 1949833681 is 1863389491.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1949833681 - 2³ = 1949833673 is a prime.

It is a super-2 number, since 2×1949833681² = 7603702767124019522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1949833687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258856 + ... + 266281.

It is an arithmetic number, because the mean of its divisors is an integer number (252066240).

Almost surely, 2^1949833681 is an apocalyptic number.

It is an amenable number.

1949833681 is a deficient number, since it is larger than the sum of its proper divisors (66696239).

1949833681 is an equidigital number, since it uses as much as digits as its factorization.

1949833681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525263.

The product of its digits is 1119744, while the sum is 52.

The square root of 1949833681 is about 44156.9210996419. The cubic root of 1949833681 is about 1249.2974571675.

The spelling of 1949833681 in words is "one billion, nine hundred forty-nine million, eight hundred thirty-three thousand, six hundred eighty-one".