1687072407 has 8 divisors (see below), whose sum is σ = 2249646576. Its totient is φ = 1124606592.

The previous prime is 1687072391. The next prime is 1687072423. The reversal of 1687072407 is 7042707861.

It is an interprime number because it is at equal distance from previous prime (1687072391) and next prime (1687072423).

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

It is not a de Polignac number, because 1687072407 - 2⁴ = 1687072391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1687072427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21903 + ... + 62079.

It is an arithmetic number, because the mean of its divisors is an integer number (281205822).

Almost surely, 2^1687072407 is an apocalyptic number.

1687072407 is a deficient number, since it is larger than the sum of its proper divisors (562574169).

1687072407 is a wasteful number, since it uses less digits than its factorization.

1687072407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54177.

The product of its (nonzero) digits is 131712, while the sum is 42.

The square root of 1687072407 is about 41073.9869868996. The cubic root of 1687072407 is about 1190.4502232108.

The spelling of 1687072407 in words is "one billion, six hundred eighty-seven million, seventy-two thousand, four hundred seven".