1954927649 has 2 divisors, whose sum is σ = 1954927650. Its totient is φ = 1954927648.

The previous prime is 1954927633. The next prime is 1954927661. The reversal of 1954927649 is 9467294591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1921945600 + 32982049 = 43840^2 + 5743^2 .

It is a cyclic number.

It is not a de Polignac number, because 1954927649 - 2⁴ = 1954927633 is a prime.

It is a super-2 number, since 2×1954927649² = 7643484225649334402, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1954927594 and 1954927603.

It is not a weakly prime, because it can be changed into another prime (1954927609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977463824 + 977463825.

It is an arithmetic number, because the mean of its divisors is an integer number (977463825).

Almost surely, 2^1954927649 is an apocalyptic number.

It is an amenable number.

1954927649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1954927649 is an equidigital number, since it uses as much as digits as its factorization.

1954927649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 56.

The square root of 1954927649 is about 44214.5637658001. The cubic root of 1954927649 is about 1250.3844468684.

The spelling of 1954927649 in words is "one billion, nine hundred fifty-four million, nine hundred twenty-seven thousand, six hundred forty-nine".