687145037 has 2 divisors, whose sum is σ = 687145038. Its totient is φ = 687145036.

The previous prime is 687145003. The next prime is 687145073. The reversal of 687145037 is 730541786.

Together with next prime (687145073) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 562353796 + 124791241 = 23714^2 + 11171^2 .

It is a cyclic number.

It is not a de Polignac number, because 687145037 - 2⁶ = 687144973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 687144985 and 687145003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687144037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343572518 + 343572519.

It is an arithmetic number, because the mean of its divisors is an integer number (343572519).

Almost surely, 2^687145037 is an apocalyptic number.

It is an amenable number.

687145037 is a deficient number, since it is larger than the sum of its proper divisors (1).

687145037 is an equidigital number, since it uses as much as digits as its factorization.

687145037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 687145037 is about 26213.4514514972. The cubic root of 687145037 is about 882.4351615566.

The spelling of 687145037 in words is "six hundred eighty-seven million, one hundred forty-five thousand, thirty-seven".