1956949697 has 2 divisors, whose sum is σ = 1956949698. Its totient is φ = 1956949696.

The previous prime is 1956949663. The next prime is 1956949699. The reversal of 1956949697 is 7969496591.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1659421696 + 297528001 = 40736^2 + 17249^2 .

It is a cyclic number.

It is not a de Polignac number, because 1956949697 - 2¹⁸ = 1956687553 is a prime.

Together with 1956949699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1956949699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978474848 + 978474849.

It is an arithmetic number, because the mean of its divisors is an integer number (978474849).

Almost surely, 2^1956949697 is an apocalyptic number.

It is an amenable number.

1956949697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1956949697 is an equidigital number, since it uses as much as digits as its factorization.

1956949697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33067440, while the sum is 65.

The square root of 1956949697 is about 44237.4241677790. The cubic root of 1956949697 is about 1250.8154033383.

The spelling of 1956949697 in words is "one billion, nine hundred fifty-six million, nine hundred forty-nine thousand, six hundred ninety-seven".