1956111349 has 2 divisors, whose sum is σ = 1956111350. Its totient is φ = 1956111348.

The previous prime is 1956111347. The next prime is 1956111373. The reversal of 1956111349 is 9431116591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1783372900 + 172738449 = 42230^2 + 13143^2 .

It is a cyclic number.

It is not a de Polignac number, because 1956111349 - 2¹ = 1956111347 is a prime.

Together with 1956111347, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1956111343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978055674 + 978055675.

It is an arithmetic number, because the mean of its divisors is an integer number (978055675).

Almost surely, 2^1956111349 is an apocalyptic number.

It is an amenable number.

1956111349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1956111349 is an equidigital number, since it uses as much as digits as its factorization.

1956111349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 40.

The square root of 1956111349 is about 44227.9476010362. The cubic root of 1956111349 is about 1250.6367633575.

The spelling of 1956111349 in words is "one billion, nine hundred fifty-six million, one hundred eleven thousand, three hundred forty-nine".