1201871687 has 2 divisors, whose sum is σ = 1201871688. Its totient is φ = 1201871686.

The previous prime is 1201871681. The next prime is 1201871711. The reversal of 1201871687 is 7861781021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201871687 - 2¹⁸ = 1201609543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201871681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600935843 + 600935844.

It is an arithmetic number, because the mean of its divisors is an integer number (600935844).

Almost surely, 2^1201871687 is an apocalyptic number.

1201871687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201871687 is an equidigital number, since it uses as much as digits as its factorization.

1201871687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 41.

The square root of 1201871687 is about 34668.0211001436. The cubic root of 1201871687 is about 1063.2107722482.

The spelling of 1201871687 in words is "one billion, two hundred one million, eight hundred seventy-one thousand, six hundred eighty-seven".