1956434309 has 4 divisors (see below), whose sum is σ = 1964229120. Its totient is φ = 1948639500.

The previous prime is 1956434297. The next prime is 1956434317. The reversal of 1956434309 is 9034346591.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1956434309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1956434309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1956434329) 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, 3897029 + ... + 3897530.

It is an arithmetic number, because the mean of its divisors is an integer number (491057280).

Almost surely, 2^1956434309 is an apocalyptic number.

It is an amenable number.

1956434309 is a deficient number, since it is larger than the sum of its proper divisors (7794811).

1956434309 is an equidigital number, since it uses as much as digits as its factorization.

1956434309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7794810.

The product of its (nonzero) digits is 349920, while the sum is 44.

The square root of 1956434309 is about 44231.5985354362. The cubic root of 1956434309 is about 1250.7055875620.

The spelling of 1956434309 in words is "one billion, nine hundred fifty-six million, four hundred thirty-four thousand, three hundred nine".