1299477649 has 2 divisors, whose sum is σ = 1299477650. Its totient is φ = 1299477648.

The previous prime is 1299477593. The next prime is 1299477653. The reversal of 1299477649 is 9467749921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1036389249 + 263088400 = 32193^2 + 16220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1299477649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1299477593 and 1299477602.

It is not a weakly prime, because it can be changed into another prime (1299477689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649738824 + 649738825.

It is an arithmetic number, because the mean of its divisors is an integer number (649738825).

Almost surely, 2^1299477649 is an apocalyptic number.

It is an amenable number.

1299477649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299477649 is an equidigital number, since it uses as much as digits as its factorization.

1299477649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6858432, while the sum is 58.

The square root of 1299477649 is about 36048.2683217932. The cubic root of 1299477649 is about 1091.2466865133.

The spelling of 1299477649 in words is "one billion, two hundred ninety-nine million, four hundred seventy-seven thousand, six hundred forty-nine".