2091470439 has 4 divisors (see below), whose sum is σ = 2788627256. Its totient is φ = 1394313624.

The previous prime is 2091470387. The next prime is 2091470443. The reversal of 2091470439 is 9340741902.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2091470439 - 2⁹ = 2091469927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2091470397 and 2091470406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091470939) 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, 348578404 + ... + 348578409.

It is an arithmetic number, because the mean of its divisors is an integer number (697156814).

Almost surely, 2^2091470439 is an apocalyptic number.

2091470439 is a deficient number, since it is larger than the sum of its proper divisors (697156817).

2091470439 is an equidigital number, since it uses as much as digits as its factorization.

2091470439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697156816.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 2091470439 is about 45732.5971162802. The cubic root of 2091470439 is about 1278.8430380197.

The spelling of 2091470439 in words is "two billion, ninety-one million, four hundred seventy thousand, four hundred thirty-nine".