687500053 has 2 divisors, whose sum is σ = 687500054. Its totient is φ = 687500052.

The previous prime is 687500003. The next prime is 687500059. The reversal of 687500053 is 350005786.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 660387204 + 27112849 = 25698^2 + 5207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-687500053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 687499991 and 687500018.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687500059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343750026 + 343750027.

It is an arithmetic number, because the mean of its divisors is an integer number (343750027).

Almost surely, 2^687500053 is an apocalyptic number.

It is an amenable number.

687500053 is a deficient number, since it is larger than the sum of its proper divisors (1).

687500053 is an equidigital number, since it uses as much as digits as its factorization.

687500053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 687500053 is about 26220.2222149241. Note that the first 4 decimals coincide. The cubic root of 687500053 is about 882.5871065113.

The spelling of 687500053 in words is "six hundred eighty-seven million, five hundred thousand, fifty-three".