1687004131 has 2 divisors, whose sum is σ = 1687004132. Its totient is φ = 1687004130.

The previous prime is 1687004117. The next prime is 1687004141. The reversal of 1687004131 is 1314007861.

It is a strong prime.

It is an emirp because it is prime and its reverse (1314007861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1687004131 - 2¹³ = 1686995939 is a prime.

It is a super-2 number, since 2×1687004131² = 5691965876022130322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1687004093 and 1687004102.

It is not a weakly prime, because it can be changed into another prime (1687004101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 843502065 + 843502066.

It is an arithmetic number, because the mean of its divisors is an integer number (843502066).

Almost surely, 2^1687004131 is an apocalyptic number.

1687004131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1687004131 is an equidigital number, since it uses as much as digits as its factorization.

1687004131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1687004131 is about 41073.1558441764. The cubic root of 1687004131 is about 1190.4341637784.

The spelling of 1687004131 in words is "one billion, six hundred eighty-seven million, four thousand, one hundred thirty-one".