1201388687 has 2 divisors, whose sum is σ = 1201388688. Its totient is φ = 1201388686.

The previous prime is 1201388651. The next prime is 1201388707. The reversal of 1201388687 is 7868831021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1201388687 - 2²⁰ = 1200340111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201388087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600694343 + 600694344.

It is an arithmetic number, because the mean of its divisors is an integer number (600694344).

Almost surely, 2^1201388687 is an apocalyptic number.

1201388687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201388687 is an equidigital number, since it uses as much as digits as its factorization.

1201388687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 1201388687 is about 34661.0543261454. The cubic root of 1201388687 is about 1063.0683278660.

The spelling of 1201388687 in words is "one billion, two hundred one million, three hundred eighty-eight thousand, six hundred eighty-seven".