1247680699 has 2 divisors, whose sum is σ = 1247680700. Its totient is φ = 1247680698.

The previous prime is 1247680673. The next prime is 1247680703. The reversal of 1247680699 is 9960867421.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1247680699 - 2⁵ = 1247680667 is a prime.

It is not a weakly prime, because it can be changed into another prime (1247680649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623840349 + 623840350.

It is an arithmetic number, because the mean of its divisors is an integer number (623840350).

Almost surely, 2^1247680699 is an apocalyptic number.

1247680699 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247680699 is an equidigital number, since it uses as much as digits as its factorization.

1247680699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 1247680699 is about 35322.5239613479. The cubic root of 1247680699 is about 1076.5506948650.

The spelling of 1247680699 in words is "one billion, two hundred forty-seven million, six hundred eighty thousand, six hundred ninety-nine".