1371121687 has 8 divisors (see below), whose sum is σ = 1479299696. Its totient is φ = 1263330432.

The previous prime is 1371121673. The next prime is 1371121733. The reversal of 1371121687 is 7861211731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1371121687 - 2⁷ = 1371121559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1371121637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89298 + ... + 103519.

It is an arithmetic number, because the mean of its divisors is an integer number (184912462).

Almost surely, 2^1371121687 is an apocalyptic number.

1371121687 is a deficient number, since it is larger than the sum of its proper divisors (108178009).

1371121687 is a wasteful number, since it uses less digits than its factorization.

1371121687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193377.

The product of its digits is 14112, while the sum is 37.

The square root of 1371121687 is about 37028.6603457376. The cubic root of 1371121687 is about 1110.9435709693.

The spelling of 1371121687 in words is "one billion, three hundred seventy-one million, one hundred twenty-one thousand, six hundred eighty-seven".