1881249279 has 32 divisors (see below), whose sum is σ = 3139530240. Its totient is φ = 975480192.

The previous prime is 1881249259. The next prime is 1881249287. The reversal of 1881249279 is 9729421881.

It is a happy number.

It is not a de Polignac number, because 1881249279 - 2⁵ = 1881249247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881249259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42292 + ... + 74505.

It is an arithmetic number, because the mean of its divisors is an integer number (98110320).

Almost surely, 2^1881249279 is an apocalyptic number.

1881249279 is a deficient number, since it is larger than the sum of its proper divisors (1258280961).

1881249279 is a wasteful number, since it uses less digits than its factorization.

1881249279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116879.

The product of its digits is 580608, while the sum is 51.

The square root of 1881249279 is about 43373.3706206931. The cubic root of 1881249279 is about 1234.4744777376.

The spelling of 1881249279 in words is "one billion, eight hundred eighty-one million, two hundred forty-nine thousand, two hundred seventy-nine".