1687150749 has 32 divisors (see below), whose sum is σ = 2344028544. Its totient is φ = 1078721280.

The previous prime is 1687150667. The next prime is 1687150799. The reversal of 1687150749 is 9470517861.

1687150749 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1687150749 - 2¹² = 1687146653 is a prime.

It is a super-2 number, since 2×1687150749² = 5692955299702522002, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1687150698 and 1687150707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1687150799) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1910262 + ... + 1911144.

It is an arithmetic number, because the mean of its divisors is an integer number (73250892).

Almost surely, 2^1687150749 is an apocalyptic number.

It is an amenable number.

1687150749 is a deficient number, since it is larger than the sum of its proper divisors (656877795).

1687150749 is a wasteful number, since it uses less digits than its factorization.

1687150749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197.

The product of its (nonzero) digits is 423360, while the sum is 48.

The square root of 1687150749 is about 41074.9406451184. The cubic root of 1687150749 is about 1190.4686497678.

The spelling of 1687150749 in words is "one billion, six hundred eighty-seven million, one hundred fifty thousand, seven hundred forty-nine".