2139446247 has 8 divisors (see below), whose sum is σ = 2852828160. Its totient is φ = 1426180920.

The previous prime is 2139446237. The next prime is 2139446249. The reversal of 2139446247 is 7426449312.

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

It is not a de Polignac number, because 2139446247 - 2⁷ = 2139446119 is a prime.

It is a super-3 number, since 3×2139446247³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2139446199 and 2139446208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139446249) 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, 32004 + ... + 72822.

It is an arithmetic number, because the mean of its divisors is an integer number (356603520).

Almost surely, 2^2139446247 is an apocalyptic number.

2139446247 is a deficient number, since it is larger than the sum of its proper divisors (713381913).

2139446247 is a wasteful number, since it uses less digits than its factorization.

2139446247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58293.

The product of its digits is 290304, while the sum is 42.

The square root of 2139446247 is about 46254.1484301679. The cubic root of 2139446247 is about 1288.5475805165.

The spelling of 2139446247 in words is "two billion, one hundred thirty-nine million, four hundred forty-six thousand, two hundred forty-seven".